Article of footwear and fluid system, foot support system and sole structure for the same

Abstract

The fluid system (1700), foot support system (including sole structure), and / or footwear (250) include: (a) a foot support bladder (1710); (b) a fluid reservoir (1720); (c) a pump (1730) (e.g., a foot-starting pump) including an inlet (1734) and an outlet (1732) supplying fluid to the foot support bladder (1710); (d) a first fluid line (1760) placing the fluid reservoir (1720) in fluid communication with the inlet (1734) of the pump (1730); and (e) a second fluid line (1766) placing the foot support bladder (1710) in fluid communication with the fluid reservoir (1720). Such fluid systems (1700), foot support systems, and / or footwear (250) may also include a switch (1740) configured to change a second fluid line (1766) between an open configuration and a closed configuration. When the second fluid line (1766) is in the closed configuration, a pump (1730) moves fluid from a fluid reservoir (1720) to a foot support bladder (1710), and sufficient fluid movement from the fluid reservoir (1720) to the foot support bladder (1710) when the second fluid line (1766) is in the closed configuration reduces the height dimensions (H1, H2) of the fluid reservoir (1720). Such fluid systems (1700), foot support systems, and / or footwear (250) may also include fluid line support members (600) (e.g., for supporting the fluid lines (1764) and / or the fluid lines (1766)).

Description

An adjustable foot support system including a fluid-filled bladder chamber This technology relates to fluid systems and / or foot support systems in the field of footwear or other foot-receiving devices. Aspects of this technology relate to fluid systems, foot support systems, sole structures, and / or footwear products that include: (i) a system for changing the stiffness or firmness of the foot support system, and / or (ii) a system for selectively moving fluid between various parts of the fluid system, foot support system, sole structure, foot-receiving device, and / or footwear product. Additional aspects of this technology relate to methods of manufacturing and / or using such fluid systems, foot support systems, sole structures, foot-receiving devices, and / or footwear products. Conventional athletic footwear products include two main components: an upper and a sole structure. The upper can provide a covering for the foot that firmly houses and positions the foot relative to the sole structure. Additionally, the upper can have a configuration that protects the foot and provides ventilation, thus keeping the foot cool and sweat-free. The sole structure can be attached to the lower surface of the upper and is typically positioned between the foot and any contact surface. In addition to attenuating ground reaction forces and absorbing energy, the sole structure can also provide traction friction and control potentially harmful foot movements, such as overpronation. The upper forms a cavity inside the footwear to house the foot. The cavity has the general shape of the foot and has an entrance to the cavity at the ankle opening. Thus, the upper extends along the medial and lateral sides of the foot and around the heel region of the foot in the dorsal and toe regions of the foot. A lacing system is typically incorporated into the upper to allow the user to selectively change the size of the ankle opening and to allow the user to modify certain dimensions of the upper, particularly the circumference, to accommodate different-sized feet. Additionally, the upper can include a tongue that extends beneath the lacing system to enhance the comfort of the footwear (e.g., to adjust the pressure exerted on the foot by the laces). The upper can also include a heel counter to limit or control the movement of the heel. At least some aspects of this technology can include structures used in systems of the type described in U.S. Patents Nos. 11,206,896 B2 and 11,234,485 B2, which are incorporated herein by reference in their entirety. The present disclosure is provided to introduce some general concepts related to this technology in a simplified form, which will be further described in the detailed description below. The present disclosure is not intended to identify key features or essential features of the claimed invention. Aspects of the present technology relate to fluid systems, foot support systems, sole structures, footwear products, and / or other foot-receiving devices, such as those of the type described and / or claimed below and / or illustrated in the figures. Such fluid systems, foot support systems, sole structures, footwear products, and / or other foot-receiving devices may include any one or more of the structures, parts, features, characteristics, and / or combinations of structures, parts, features, and / or characteristics of the examples described and / or claimed below and / or illustrated in the figures. Although aspects of the present technology are described in terms of fluid systems and / or foot support systems, additional aspects of the present technology relate to sole structures; footwear products; other foot-receiving devices; methods of manufacturing such fluid systems, foot support systems, sole structures, footwear products, and / or other foot-receiving devices; and / or methods of using such fluid systems, foot support systems, sole structures, footwear products, and other foot-receiving devices. [Cross-Reference to Related Applications] This application claims the benefit of priority to U.S. Provisional Patent Application No. 63 / 498,593, filed on April 27, 2023, entitled "Adjustable Foot Support Systems Including Fluid-Filled Bladder Chambers," which is hereby incorporated by reference in its entirety. Additionally, U.S. Provisional Patent Application No. 63 / 477,719, filed on December 29, 2022, entitled "Adjustable Foot Support Systems Including Fluid-Filled Bladder Chambers," is hereby incorporated by reference in its entirety. In the following description of various examples of footwear structures and components in accordance with the present technology, reference is made to the figures, which form a part hereof, and in which are shown by way of illustration various example structures and environments in which aspects of the present technology may be practiced. It is to be understood that other structures and environments may be utilized and structural and functional modifications may be made to the specifically described structures and methods without departing from the scope of the present disclosure. As used herein, the term "footwear" means any type of clothing for the foot, and the term includes, but is not limited to: all types of shoes, boots, athletic shoes, sandals, thongs, flip-flops, mules, bedroom shoes, slip-ons, sport-specific shoes (such as golf shoes, tennis shoes, baseball shoes, football shoes or rugby shoes, ski boots, basketball shoes, cross-training shoes, dance shoes, etc.), and the like. As used herein, the term "foot-receiving device" means any device into which a user places at least a portion of his or her foot. In addition to various types of "footwear", foot-receiving devices include, but are not limited to: bindings and other devices for securing the foot to skis, cross-country skis, water skis, snowboards, etc.; bindings, clamps or other devices for securing the foot to pedals for use with bicycles, exercise equipment, etc.; bindings, clamps or other devices for receiving the foot during video games or other games, and the like. A "foot-receiving device" may include one or more "foot-covering members" (e.g., similar to a footwear upper component) that assist in positioning the foot relative to other components or structures; and one or more "foot-supporting members" (e.g., similar to a footwear sole structure component) that support at least a portion or portions of the plantar surface of the user's foot. A "foot-supporting member" may include components for and / or as the midsole and / or outsole of a footwear product (or components that provide a corresponding function in a non-footwear foot-receiving device). Various structures and parameters of a foot support system, a sole structure, and / or a footwear article are described based on a "longitudinal length" parameter L. Refer to FIG. 2A. The longitudinal length L can be found under unloaded conditions (e.g., no weight is applied thereto other than the weight of other components of the footwear article 250 or the sole structure 200) when the footwear article 250 or the sole structure 200 is oriented on a horizontal support surface S on its ground-facing surface (e.g., on its sole structure 200). Once so oriented, parallel vertical planes VP perpendicular to the horizontal support surface S are oriented to contact the rearmost heel (RH) position and the foremost toe (FT) position of the footwear article 250 (or the upper 202, or the sole structure 200, or another component of interest). The parallel vertical planes VP should be oriented to face each other, e.g., extending into and out of the page of FIG. 2A, and as far apart from each other as possible while still contacting the rearmost heel RH and the foremost toe FT positions. The direct distance between these vertical planes VP corresponds to the longitudinal length L of the footwear article 250 (or the upper, or the sole structure 200, or another component of interest). The positions of various footwear features and / or components are described in this specification based on their respective positions along the longitudinal length L as measured forward from the rear heel vertical plane VP. Along the longitudinal length L, the rearmost heel position is at position 0L, and the foremost toe position is at position 1L. Intermediate positions along the longitudinal length L are represented by fractional positions (e.g., 0.25L) along the longitudinal length L measured forward from the rear heel vertical plane VP. As used herein, the term "parallel plane" is a plane oriented parallel to the vertical plane VP. These parallel planes can intersect the longitudinal length L or the longitudinal direction somewhere between P = 0L and P = 1.0L. Refer to FIG. 2A, including example parallel plane position indicators at 0.16L, 0.26, 0.35L, and 0.46L. As used herein, the term "rearward" means located at or toward the heel region of the footwear article (or its component), and as used herein, the term "forward" means located at or toward the forefoot or toe region of the footwear article (or its component). Unless otherwise defined, the term "heel" or "heel region" refers to the region defined by parallel planes at 0L and 0.3L, the term "midfoot" or "arch" refers to the region defined by parallel planes at 0.3L and 0.6L, and the term "forefoot" refers to the region defined by parallel planes at 0.6L and 1.0L. Additionally, the term "lateral" means the "little toe" side or outer edge of the footwear article or its component (e.g., the upper, the sole structure, etc.), and the term "medial" means the "big toe" side or inner edge of the footwear article or its component (e.g., the upper, the sole structure, etc.). As used herein, the term "port" includes any opening in a component through which a fluid (e.g., gas) can enter or leave the component. Some "ports" can include one or more hardware components or other structures to which a fluid line can be connected, for example. In some examples of the present technology, a fluid line can be connected to a "port" of another component by an adhesive, by a fusion technique (also referred to herein as "fusion technology") such as heat fusion or welding, by a mechanical connector, etc. In an exemplary structure in which a fluid line is integrally formed with another part such as a pump, a foot support bladder, a storage chamber component (e.g., a storage chamber bladder), or other fluid source component, the "port" can be considered to be the location where the internal chamber size changes from a relatively small fluid line size to a relatively larger and more open volume (e.g., a change in cross-sectional area). This application and / or its claims use terms such as "first," "second," "third," etc. to identify certain components and / or features related to the present technology. The use of these terms is for convenience only, for example, to illustrate the distinction between components and / or features that maintain a particular structure. The use of these terms should not be construed as requiring a particular order or arrangement of the components and / or features being discussed. Additionally, the use of these particular terms for a particular structure in the specification does not require the use of the same terms in the claims to refer to the same part (e.g., a component or feature referred to as "third" in the specification can correspond to any numerical adjective used for that component or feature in the claims). I. Overview of Aspects of the Present Technology As described above, aspects of the present technology relate to fluid systems, foot support systems, sole structures, footwear products, and / or other foot-receiving devices, such as the types described and / or claimed below and / or illustrated in the figures. Such fluid systems, foot support systems, sole structures, footwear products, and / or other foot-receiving devices can include any one or more of the structures, parts, features, characteristics, and / or combinations of structures, parts, features, and / or characteristics described and / or claimed below and / or illustrated in the figures. As some more specific examples, aspects of the present technology relate to fluid systems, foot support systems, sole structures, and / or footwear products that include: (a) a foot support bladder (e.g., including a first port and a second port); (b) a fluid storage chamber (e.g., including a third port); (c) a pump (e.g., a foot-activated pump) including an inlet and an outlet, the outlet supplying fluid to the fluid storage chamber; (d) a first fluid line that places the foot support bladder in fluid communication with the inlet of the pump; and (e) a second fluid line that places the foot support bladder in fluid communication with the fluid storage chamber. In some examples of this aspect of the present technology, the pump and the fluid storage chamber may include multiple portions of a single component (e.g., portions of a single fluid-filled bladder and / or fluid source component). Such fluid systems, foot support systems, sole structures, and / or footwear products may also include one or more of the following: (i) a fluid line support member (e.g., for supporting one or both of the first fluid line and / or the second fluid line); and / or (ii) a switch (e.g., for changing at least one of the first fluid line and / or the second fluid line between an open configuration and a closed configuration). Such foot support systems, sole structures, and / or footwear products may also include one or more of the following: (i) one or more midsole components (e.g., above and / or below the foot support bladder, between the foot support bladder and the fluid storage chamber, at least partially separating the foot support bladder and the fluid storage chamber, etc.); (ii) one or more outsole components (e.g., forming the bottom outer surface (e.g., the ground contact surface) of the foot support system, sole structure, and / or footwear product); and / or (iii) one or more pump actuator components (e.g., in the heel and / or forefoot regions), etc. Other examples and aspects of the present technology relate to fluid systems, foot support systems, sole structures, and / or footwear products that include: (a) a foot support bladder (e.g., including a first port and a second port); (b) a fluid storage chamber (e.g., including a third port); (c) a pump (e.g., a foot-activated pump) including an inlet and an outlet, the outlet supplying fluid to the foot support bladder; (d) a first fluid line that places the fluid storage chamber in fluid communication with the inlet of the pump; and (e) a second fluid line that places the foot support bladder in fluid communication with the fluid storage chamber. In some examples of this aspect of the present technology, the pump and the fluid storage chamber may include multiple parts of a single component (e.g., parts of a single fluid-filled bladder and / or fluid source component). Such fluid systems, foot support systems, sole structures, and / or footwear products may also include one or more of the following: (i) a fluid line support member (e.g., for supporting one or both of the first fluid line and / or the second fluid line); and / or (ii) a switch (e.g., for changing at least one of the first fluid line and / or the second fluid line between an open configuration and a closed configuration). Such foot support systems, sole structures, and / or footwear products may also include one or more of the following: (i) one or more midsole components (e.g., above and / or below the foot support bladder, between the foot support bladder and the fluid storage chamber, at least partially separating the foot support bladder and the fluid storage chamber, etc.); (ii) one or more outsole components (e.g., forming the bottom outer surface (e.g., the ground contact surface) of the foot support system, sole structure, and / or footwear product); and / or (iii) one or more pump actuator components (e.g., in the heel and / or forefoot regions), etc. Additionally or alternatively, the fluid system, foot support system, sole structure, and / or footwear product according to this aspect of the present technology may change in height (e.g., increasing the height dimension of one or more of the fluid storage chamber, sole structure, and / or footwear product) as the fluid system, foot support system, sole structure, and / or footwear product transitions between a higher pressure foot support configuration (e.g., the switch closes the second fluid line) and a lower pressure foot support configuration (e.g., the switch opens the second fluid line). Given the general description of the features, aspects, structures, processes, and arrangements of certain examples according to the present technology provided above, the following is a more detailed description of specific example fluid systems, foot support systems, sole structures, footwear products, and methods according to the present technology. II. DETAILED DESCRIPTION OF EXAMPLE FLUID SYSTEMS, FOOT SUPPORT SYSTEMS, SOLE STRUCTURES, FOOTWEAR PRODUCTS, AND OTHER COMPONENTS / FEATURES ACCORDING TO THE PRESENT TECHNOLOGY With reference to the drawings and the following discussion, various examples of fluid systems, foot support systems, sole structures, and / or footwear products according to aspects of the present technology are described. Figures 1A and 1B schematically illustrate a fluid system 100 according to at least some aspects of the present technology. The fluid system 100 can be incorporated into a foot support system (e.g., a sole structure) and / or a footwear product in various ways, such as in a manner described in more detail below. The exemplary fluid system 100 is a "closed system", e.g., the fluid system 100 has a fixed amount (e.g., mass) of fluid (e.g., a gas, such as air or other gas, including gases commonly known and used in foot support bladder systems) sealed therein, and the fluid system 100 does not introduce new fluid from the external environment and does not discharge fluid to the external environment. However, alternatively, at least some aspects of the present technology can be used in an "open" fluid system, e.g., a fluid system that introduces air (or other gas) from the external environment and / or discharges air (or other gas) to the external environment to change the foot support pressure in a foot support bladder. FIG. 1A shows the fluid system 100 in a "low pressure" foot support configuration, and FIG. 1B shows the fluid system 100 in a "high pressure" foot support configuration. As shown in these figures, the fluid system 100 includes a foot support bladder 400 and a fluid storage chamber 500 (which may include a fluid filled bladder or other fluid container). A pump 550 (e.g., a foot activated pump such as a ball type pump) moves fluid from the foot support bladder 400 to the fluid storage chamber 500. When the switch member 900 is closed, as shown in FIG. 1A, the pump 550 moves fluid out of the foot support bladder 400 and into the fluid storage chamber 500 to place the foot support bladder 400 in a lower pressure foot support configuration. Specifically, compression of the internal chamber 550C of the pump 550 (e.g., in response to the user's footsteps) forces fluid towards the pump outlet 552 while the check valve 114 prevents fluid from flowing from the pump 550 into the foot support bladder 400 via the fluid line 402. As long as the pressure generated by the compression of the pump 550 is greater than the pressure in the fluid storage chamber 500, the fluid will move through the fluid line 502, through the check valve 118, and into the internal chamber 500C of the fluid storage chamber 500 (e.g., through the storage chamber port 510). Alternatively, the fluid line 502 may be omitted (or may be very short, e.g., as shown in FIGS. 5C and 5D discussed below) such that the pump outlet 552 supplies fluid directly to the check valve 118 substantially, and / or the check valve 118 may be directly connected to the storage chamber port 510 and / or the internal chamber 500C of the fluid storage chamber 500. When the internal chamber 550C of the pump 550 expands again (e.g., when the user lifts his / her foot off the contact surface), fluid is drawn out of the internal chamber 400C of the foot support bladder 400, enters the fluid line 402 through the bladder port 410, and enters the internal chamber 550C of the pump 550 (via the fluid source port 554A, the fluid source line 402A, the check valve 114, and the pump inlet 554). The dashed line labeled 520 in FIG. 1A (and FIG. 1B) outlines the components that may be included within the fluid source component 520, which is discussed in more detail below in connection with FIGS. 5A - 5D. In the configuration shown in FIG. 1A: (i) the closed switch member 900 prevents fluid from flowing from the fluid storage chamber 500 to the foot support bladder 400 via the fluid line 504, and (ii) the check valve 118 prevents fluid from flowing from the fluid storage chamber 500 to the pump 550 via the fluid line 502. Thus, in this configuration, over time (e.g., after one or more footstep cycles), by activating the pump 550, fluid will move from the foot support bladder 400 to the fluid storage chamber 500, thereby placing the foot support bladder 400 under a lower pressure than the fluid storage chamber 500. This action and configuration place the exemplary foot support bladder 400 in a lower pressure foot support configuration. When the switch member 900 is opened, as shown in FIG. 1B, this opens the fluid line 504 and allows fluid to flow from the fluid storage chamber 500 to the foot support bladder 400 via the fluid line 504 (e.g., fluid flows between the storage chamber port 512 and the bladder port 412 via the fluid line 504). This switching action equalizes the pressure in the internal chamber 400C of the foot support bladder 400 and the internal chamber 500C of the fluid storage chamber 500, e.g., thereby increasing the pressure in the internal chamber 400C and decreasing the pressure in the internal chamber 500C. This action and configuration places the exemplary foot support bladder 400 in a higher pressure foot support configuration. In use, when the user steps on the pump 550 in the configuration shown in FIG. 1B, the fluid will freely flow around the loop - from the pump 550, through the fluid line 502, into the fluid storage chamber 500, through the fluid line 504, into the foot support bladder 400, through the fluid line 402 and back into the pump 550. Exemplary sole structures 200, footwear articles 250, and / or their components that include and / or form at least portions of the fluid system 100 in accordance with aspects of the present technology will now be described in conjunction with FIGS. 2A - 16C. FIGS. 2A - 2E provide various views of the footwear article 250 and / or the sole structure 200 in accordance with at least some examples of the present technology. More specifically, FIG. 2A illustrates an outer view of the footwear article 250 and the sole structure 200 in accordance with some aspects of the present technology; FIG. 2B provides an inner view of the sole structure 200; FIG. 2C provides a top view of the sole structure 200; FIG. 2D provides a bottom view of the sole structure 200; FIG. 2E provides a rear - outer perspective view of the sole structure 200. The footwear article 250 shown in FIG. 2A includes an upper 202 and a sole structure 200 that is joined to the upper 202. Only a portion of the upper 202 is shown in FIG. 2A as a dashed line, but the upper 202 can include any desired materials, components, number of components, construction, structure, etc. without departing from the present technology, including conventional materials, components, number of components, construction, structure, etc. known and used in the footwear art. The upper 202 can be joined to the sole structure 200 in any desired manner, including by using one or more of adhesives, stitching, or mechanical fasteners, including in a manner that is conventionally known and used in the footwear art. Figures 2A through 2E illustrate various portions of fluid system 100, a foot support system (e.g., sole structure 200), and footwear article 250 in an assembled configuration. The various portions identified in Figures 2A through 2E are illustrated and described in greater detail in connection with Figures 3A through 16C. More specifically, Figures 2A through 2E illustrate footwear article 250 and sole structure 200, which includes: (a) a first midsole member 300 (also shown in Figures 3A through 3D); (b) a foot support bladder 400 (not identified in Figures 2A through 2E, but shown in Figures 4A through 4D); (c) a fluid source member 520 (which may also include a fluid fill bladder, not identified in Figures 2A through 2E, but shown in Figures 5A through 5D and including a combination of a fluid storage chamber 500 and a pump 550); (d) a support member 600 (e.g., a fluid line support and / or a switch support) and its components (also shown in Figures 6A through 8); (e) a fluid tube connector member 800 (also shown in Figures 9A and 9B); (f) a switch member 900 (also shown in Figures 11A and 11B); (g) a second midsole member 1000 (also shown in Figures 12A through 12D); (h) heel support members 1100L, 1100M (also shown in Figures 13A through 14B); (i) an outsole member 1200 (also shown in Figures 15A and 15B); and (j) a pump actuator member 1300 (also shown in Figures 16A through 16C). Figures 10A through 10D provide various views of the components of assembled fluid system 100 with other footwear portions hidden. In instances where the same element symbol appears in more than one drawing, the element symbol is intended to represent the same or similar portion in all views shown. The first midsole member 300 (e.g., a lower midsole member) is shown in Figures 3A through 3D, where Figure 3A provides an outer side view, Figure 3B provides an inner side view, Figure 3C provides a top view, and Figure 3D provides a bottom view. In the illustrated example, the first midsole member 300 includes a single polymer foam member (e.g., composed of ethylene vinyl acetate (EVA) foam, polyurethane foam, etc.), but other configurations and / or materials (e.g., rubber, other elastomers, thermoplastic polyurethane, etc.) may also be used. Alternatively, if desired, the first midsole member 300 may be made of two or more component parts, including: one or more polymer foam midsole members, one or more mechanical damping members, one or more fluid fill bladders (e.g., in addition to the foot support bladder 400 described in greater detail below), one or more heel components, one or more forefoot components, one or more arch support portions, etc. The first midsole member 300 includes an upward-facing surface 300U and a ground-facing surface 300G. The outer surface 300L and the inner surface 300M extend along both sides of the first midsole member 300 between the upward-facing surface 300U and the ground-facing surface 300G. These side surfaces 300L and / or 300M can have any desired size, shape, thickness, texture (e.g., including smooth walls, textured walls, combinations, etc.), decorative features, and the like. The lines and grooves shown in FIGS. 3A-3D (and other figures) represent an example of a decorative design for the wall surfaces. The first midsole member 300 also includes a forefoot tip 300T and a heel end 300H. Thus, the illustrated first midsole member 300 extends throughout and is located beneath all or substantially all (e.g., at least 90% or even at least 95% of the surface area) of the plantar surface of the wearer's foot and / or supports all or substantially all of the plantar surface of the wearer's foot (although other sizes are possible). FIGS. 3A, 3C, and 3D illustrate that the exemplary first midsole member 300 includes a receiving portion 310 (e.g., a notched recess) formed in one sidewall (e.g., the outer sidewall in the illustrated example). Alternatively, if desired, such a receiving portion 310 can be formed in the inner sidewall, the heel wall, or other locations on the first midsole member 300. The receiving portion 310 is provided to accommodate and house the support member 600 and the switch member 900 as well as other components of the fluid system 100, which will be described in more detail below. In some examples of the present technology, the rear wall 310R of the receiving portion 310 may be located in the first midsole member 300, the sole structure 200, and / or the footwear article 250: (a) behind a parallel plane located at 0.5L, and in some examples, behind a parallel plane located at 0.45L, 0.42L, or 0.4L, and / or (b) in front of a parallel plane located at 0.25L, and in some examples, in front of a parallel plane located at 0.28L, 0.3L, or 0.32L. See also FIG. 2A. Additionally or alternatively, the front wall 310F of the receiving portion 310 may be located in the first midsole member 300, the sole structure 200, and / or the footwear article 250: (a) behind a parallel plane located at 0.6L, and in some examples, behind a parallel plane located at 0.55L, 0.52L, or 0.5L, and / or (b) in front of a parallel plane located at 0.35L, and in some examples, in front of a parallel plane located at 0.38L, 0.4L, or 0.42L. As shown in FIG. 2A, in the illustrated example, the rear wall 310R is located at approximately 0.35L, and the front wall 310F is located at approximately 0.46L (e.g., at least partially or completely within the midfoot region of the sole structure 200 and / or the footwear article 250). The receiving portion edge 310E extends between the front wall 310F and the rear wall 310R. See FIGS. 3A, 3C, and 3D. Although shown as a relatively rectangular-shaped notch or cutout in FIGS. 3A, 3C, and 3D, the receiving portion 310 may have any desired size and / or shape. The first midsole member 300 of the example is at least partially sandwiched between the foot support bladder 400 and the fluid source member 520 in the final sole structure 200. Thus, while the upward-facing surface 300U of the first midsole member 300 can be any desired shape, including a flat and / or smooth contour, in the illustrated example as shown in FIG. 3C, the size and shape of the upward-facing surface 300U are designed to accommodate and hold the foot support bladder 400. Similarly, the ground-facing surface 300G of the first midsole member 300 can be any desired shape, including a flat and / or smooth contour. In the illustrated example, as shown in FIG. 3D, the ground-facing surface 300G includes one or more of the following: (a) a base surface 312 to which a portion of the support member 600 is attached (e.g., base region 602, see FIG. 10D); (b) a fluid line support region 314 for engaging and / or accommodating at least a portion of the fluid source line 402A; (c) a valve support region 316 for engaging and / or accommodating at least a portion of the check valve 114; (d) a pump support region 318 (e.g., a circular recess) for engaging and / or accommodating at least a portion of the pump 550; (e) a valve support region 320 for engaging and / or accommodating at least a portion of the check valve 118; (f) one or more protrusions 322 (e.g., in the midfoot region and / or forefoot region) configured to engage corresponding recesses on the fluid reservoir 500 (or other portions of the fluid source member 520), and / or (g) a recess 324 for accommodating at least a portion of the upward-facing surface 500U of the fluid reservoir 500 and / or at least a portion of the entire fluid source member 520. Figures 4A through 4D provide, respectively, a top view, an outer side view, a bottom view, and an inner side view of a foot support bladder 400 that can be used in accordance with some examples of the present technology. The foot support bladder 400 can be formed from a thermoplastic elastomeric material (e.g., two sheets, one folded sheet, etc.) in a manner that is commonly known and used in the footwear art. The illustrated example foot support bladder 400 includes an upward-facing surface 400U, a ground-facing surface 400G, and a sealed peripheral seam 400S, where the sheets forming the surfaces 400U, 400G are welded, heat-sealed, and / or otherwise joined together. An internal chamber 400C (described above in connection with FIGS. 1A and 1B) is defined between the upward-facing surface 400U and the ground-facing surface 400G and inside the sealed peripheral seam 400S. One or more internal seams or welds 404 (one is shown in the examples of FIGS. 4A through 4D) can be provided, for example, to control the shape of the foot support bladder 400 when inflated. According to the present technology, the foot support bladder 400 can have various shapes and / or sizes. In the illustrated example, the foot support bladder 400 includes: (i) a heel region 400H (e.g., which supports at least 50% of the surface area of the wearer's heel), (ii) a forefoot region 400F (e.g., which supports at least 50% of the surface area of the wearer's forefoot), and (iii) a midfoot connection portion 400M, which is narrower and offset towards the outer side of the foot support bladder 400 compared to the heel region 400H and the forefoot region 400F. The internal chamber 400C of the illustrated example foot support bladder 400 extends continuously between the heel region 400H and the forefoot region 400F through the midfoot connection portion 400M. In fact, the internal chamber 400C of the illustrated example foot support bladder 400 extends continuously throughout the foot support bladder 400 (except at any internal seams 404 and / or recesses), such that the entire internal chamber 400C is in open fluid communication. Figures 4A through 4C also illustrate that the example foot support bladder 400 includes a first bladder port 410 that will be connected to a fluid line 402 that provides fluid from the internal chamber 400C of the foot support bladder 400 to the pump 550. Additionally, the example foot support bladder 400 includes a second bladder port 412 that will be connected to a fluid line 504 that extends between the internal chamber 500C of the fluid storage chamber 500 and the internal chamber 400C of the foot support bladder 400 and connects the internal chamber 500C of the fluid storage chamber 500 to the internal chamber 400C of the foot support bladder 400. In the illustrated example, the first bladder port 410 and the second bladder port 412 are located on the side edge of the foot support bladder 400 (e.g., adjacent to each other at the outer side edge in the midfoot connection portion 400M), and they can be positioned at or within the receiving portion 310 of the first midsole member 300 in the final assembled sole structure 200. Figures 5A through 5D respectively provide an outer view, an inner view, a top view, and a bottom view of a fluid source component 520 (e.g., including a combined pump 550 and a fluid reservoir 500) that can be used according to some examples of the present technology. Any desired type of fluid source component 520 (e.g., a fluid container) can be used in examples of the present technology. However, in the illustrated example, the fluid source component 520 constitutes a fluid-filled bladder, for example, formed from a thermoplastic elastomer material (e.g., two sheets, a folded sheet, etc.) in a manner commonly known and used in the footwear art. The illustrated example fluid source component 520 includes an upward-facing surface 500U, a ground-facing surface 500G, and a sealed peripheral seam 500S, where the sheets forming the surfaces 500U, 500G are welded, heat-sealed, and / or otherwise joined together. An internal chamber 500C (described above in connection with FIGS. 1A and 1B) is defined between the upward-facing surface 500U and the ground-facing surface 500G and inside the sealed peripheral seam 500S. One or more internal seams, welds, or recesses 522 can be provided, for example, to control the shape of the fluid source component 520 and / or to form additional components within the fluid source component 520, which will be described in more detail below. According to the present technology, the fluid source component 520 can have various shapes and / or sizes. In the illustrated example, the fluid source component 520 includes: (i) a heel region 500H (e.g., which supports at least 50% (and in some embodiments, at least 75%)) of the surface area of the wearer's heel), (ii) a forefoot region 500F (e.g., which supports at least 15% (and in some embodiments, at least 20% or at least 25%)) of the surface area of the wearer's forefoot), and (iii) a midfoot portion 500M between the heel region 500H and the forefoot region 500F. The internal chamber of the illustrated example fluid source component 520 extends continuously between the heel region 500H and the forefoot region 500F through the midfoot portion 500M. In fact, the internal chamber of the illustrated example fluid source component 520 extends continuously throughout the fluid source component 520 (except at any internal welds 520W and / or recesses 522). The entire structure of the fluid source component 520 of this example actually constitutes two parts of the entire fluid system 100 described above in connection with FIGS. 1A and 1B: the pump 550 and the fluid storage chamber 500. The sealed or welded pipeline 520W defines one or more of the following: (a) the fluid source pipeline 402A extending from the fluid source port 554A to the check valve 114 area; (b) the check valve 114 area; (c) the pump 550 (e.g., formed as a foot-activated compressible ball-type pump); (d) the pump inlet 554; (e) the pump outlet 552; (f) the check valve 118 area; (g) the fluid pipeline 502, and / or (h) the storage chamber port (inlet) 510 leading to the part of the fluid storage chamber 500 of the fluid source component 520. As shown in FIGS. 5C and 5D, the fluid pipeline 502 can be omitted or can be very short, e.g., such that the pump outlet 552 supplies fluid substantially directly to the check valve 118 and / or the check valve 118 can be directly connected to the storage chamber port 510 and / or lead to the internal chamber 500C of the fluid storage chamber 500. The sealed or welded pipeline 520W at the upward-facing surface 500U shown in FIG. 5C matches the features at the ground-facing surface 300G of the first midsole component 300 shown in FIG. 3D. More specifically: (a) at least a portion of the fluid source pipeline 402A of the fluid source component 520 matches the position of the fluid pipeline support area 314 of the first midsole component 300, (b) the check valve 114 area matches the position of the valve support area 316, (c) the pump 550 area matches the position of the pump support area 318, and (d) the check valve 118 area matches the position of the valve support area 320. The overall contour (e.g., the outer periphery) of the fluid source component 520 can be shaped to fit into the recess 324 provided in the ground-facing surface 300G of the first midsole component 300. FIGS. 5A, 5C, and 5D also illustrate that the exemplary fluid source component 520 includes a storage chamber port 512 that will be connected to a fluid pipeline 504 that transfers fluid between the internal chamber 400C of the foot support bladder 400 and the internal chamber 500C of the fluid storage chamber 500. Additionally, the exemplary fluid source component 520 includes a fluid source port 554A that will be connected to a fluid pipeline 402 to move fluid from the foot support bladder 400 to the pump 550 (via the fluid source pipeline 402A, the check valve 114, and the pump inlet 554). In the illustrated example, the storage chamber port 512 and the fluid source port 554A are located on the side edge of the fluid source component 520 (e.g., adjacent to each other at the outer edge), and they can be positioned within the receiving portion 310 of the first midsole component 300 in the final assembled sole structure 200. The fluid flow in the exemplary fluid source component 520 is shown by the large fluid flow arrow 590 in FIG. 5C. As shown in FIGS. 5C and 5D, in this example, the storage chamber port 512 and the fluid source port 554A are located within a recessed notch 508 formed in the outer side of the fluid source component 520 (e.g., at the inner wall 508W). The recessed notch 508 can generally correspond in size, shape, and / or position to the receiving portion 310 in the first midsole component 300 and can be configured to accommodate a support component 600 as described in more detail below. FIGS. 5C and 5D also show one or more recesses 522 formed in the fluid source component 520 (e.g., formed in the fluid storage chamber 500 portion of the fluid source component 520). These recesses 522 can be formed as internal solder joints, for example, where the inner surface of the upward-facing surface 500U is fixedly attached (e.g., welded, bonded, etc.) to the inner surface of the ground-facing surface 500G. The recesses 522 in the fluid source component 520 can be positioned to correspond to the positions of corresponding protrusions 322 provided in the ground-facing surface 300G of the first midsole component 300. Although FIGS. 5C and 5D show a staggered pattern of recesses 522 in three rows oriented left and right in the midfoot region and / or forefoot region of the fluid source component 520, any desired number of recesses, number of rows, number of columns, size, shape, orientation, and / or arrangement of the recesses (or other engagement components) can be used in other specific examples of this technology. Additionally or alternatively, if desired, one or more of the recesses 522 shown in FIGS. 5C and 5D can be replaced with protrusions whose size, shape, and / or position are designed to engage corresponding recesses provided in the ground-facing surface 300G of the first midsole component 300. Thus, various surface engagements between the ground-facing surface 300G of the first midsole component 300 and the upward-facing surface 500U of the fluid source component 520 can be used without departing from this technology. Figures 6A-6F provide various views of a support member 600 (e.g., a fluid line support member and / or a switch support member) that can be used in at least some examples of the present technology. Figure 6A provides a rear view of the support member 600; Figure 6B provides a front view; Figure 6C provides an inward-facing side view; Figure 6D provides an outward-facing side view; and Figures 6E and 6F provide perspective views. The exemplary support member 600 supports both: (i) a fluid line 402 that connects between the foot support bladder 400 and the pump 550 portion of the fluid source member 520, and (ii) a fluid line 504 that connects between the foot support bladder 400 and the fluid storage chamber 500 portion of the fluid source member 520. Additionally, the exemplary support member 600 supports a switch member 900 for changing the fluid system 100 between the lower pressure foot support configuration of Figure 1A and the higher pressure foot support configuration of Figure 1B. Alternatively, if desired, different and / or separate components can be provided for supporting the different fluid lines 402, 504. Still additionally or alternatively, if desired, different and / or separate components can be provided for supporting the fluid line 402 and / or 504 and the switch member 900. The support member 600 of this example includes: (a) a base region 602 that extends laterally into the entire sole structure 200 (and engages the base surface 312 of the first midsole member 300 shown in Figures 3D and 10D); (b) a fluid line support surface 604; and (c) at least one switch support region. The bottom surface of the base region 602 of this example includes one or more notched regions 602A that are configured to receive features of the upward-facing surface 500U of the fluid source member 520 (e.g., configured to receive the fluid source line 402A in the assembled sole structure 200 without clamping it closed, to receive the storage chamber port 512 and / or the fluid source port 554A in the assembled sole structure 200 without clamping it closed, etc.). The support member 600 of this example includes a fluid line support surface 604, and the fluid line support surface 604 includes two fluid line support regions 604A and 604B. Although other arrangements are possible, in the illustrated example, the two fluid line support regions 604A and 604B are arranged adjacent to each other such that the fluid line support regions 604A and 604B will be spaced apart in the heel-to-toe direction in the ultimately assembled fluid system 100 and / or sole structure 200. In this example, the fluid line support region 604A is arranged to support a fluid line 402 extending between the foot support bladder 400 and the fluid source port 554A. The fluid line support region 604A includes a concave outer surface that is configured to be located under and support a portion of the tubular outer surface of the fluid line 402 (e.g., described in more detail below in connection with FIGS. 9A and 9B). The concave outer surface of the fluid line support region 604A of this example extends around an arc of approximately 180 degrees and forms a part of the outer surface of the support member 600. In this example, the fluid line support region 604B is arranged to support a fluid line 504 extending between the foot support bladder 400 and the storage chamber port 512. In this example, the fluid line support region 604B is located in front of the fluid line support region 604A (relative to the ultimately assembled fluid system 100, sole structure 200, and / or the entire footwear article 250). The fluid line support region 604B of this example also includes a concave outer surface that is configured to be located under and support a portion of the tubular outer surface of the fluid line 504 (e.g., described in more detail below in connection with FIGS. 9A and 9B). The concave outer surface of the fluid line support region 604B of this example extends around an arc of approximately 180 degrees and forms a part of the outer surface of the support member 600. In the illustrated example, the fluid line support regions 604A and 604B are positioned adjacent to each other and / or extend substantially parallel to each other, but other sizes, shapes, and / or relative arrangements and orientations are possible in other specific examples. As shown in FIGS. 6C to 6F, the fluid line support surface 604 includes front, rear, and central raised ridges 604R that define receptions for the fluid line support regions 604A and 604B and separate the fluid line support regions 604A and 604B from each other, and separate the fluid line support regions 604A and 604B from the side support members 610F and 610R. The raised ridges 604R also provide surfaces for receiving an adhesive that is used to secure the fluid line connector member 800 (which includes the fluid lines 402 and 504) to the support member 600. The fluid pipeline support region 604B of this example further includes a recess or receiving portion 606 defined in its exposed surface. In this exemplary structure, the size and shape of the receiving portion 606 are designed to accommodate the tube closure member 700, which in the illustrated example includes a cylindrical member (e.g., formed of a rigid plastic material such as thermoplastic polyurethane, other thermoplastic elastomers, polyether block amide, etc., formed of a metal or metal alloy material, etc.). See FIGS. 7 and 8. When placed in the receiving portion 606, as shown in FIG. 8, the outer surface 700A of the tube closure member 700 will project outwardly into the fluid pipeline support region 604B and abut against the outer surface of the fluid pipeline 504 when the fluid pipeline 504 is installed in the fluid pipeline support region 604B. The tube closure member 700 provides a solid support surface for helping to clamp the fluid pipeline 504 closed when the switch member 900 is in the closed configuration as shown in FIG. 1A (and as will be explained in more detail below). FIGS. 6A - 6F also illustrate that the support member 600 of this example includes switch support members, namely: a rear switch support member 610R and a front switch support member 610F. In the illustrated example, the rear switch support member 610R and the front switch support member 610F are spaced apart (e.g., joined by the base region 602), and the fluid pipeline support surface 604 (including the fluid pipeline support regions 604A and 604B in this example) is provided between the rear switch support member 610R and the front switch support member 610F. In this example, each switch support member 610F, 610R includes one or more support elements for supporting the switch member 900. In the illustrated example, the front switch support member 610F includes a front support hole 612F, and the rear switch support member 610R includes a rear support hole 612R. The support holes 612F, 612R are arranged to accommodate the axial elements 902F, 902R of the switch member 900 (see FIGS. 11A and 11B), such that the switch member 900 will be rotatably mounted on the support member 600. Rotation of the switch member 900 about an axis extending through the support holes 612F, 612R causes the fluid system 100 to change between the closed configuration and the open configuration as described above in connection with FIGS. 1A and 1B. According to the present technology, the support member 600 can have any desired configuration, be formed of any number of parts, and / or be formed of any desired material. In the illustrated example, the support member 600 can be formed as a single integral part of a rigid material such as plastic (e.g., thermoplastic polyurethane, other thermoplastic elastomers, polyether block amide, metal, metal alloy, etc.). As some more specific examples, the support member 600 can be made by an injection molding process, by another molding process, by a 3D printing process, etc. In some examples of the present technology, fluid pipelines 402 and 504 (e.g., plastic tubes) can be formed as separate components, such as separate flexible polymer tubes. In such a structure, one end of the fluid pipeline 402 can be joined to the foot support bladder 400 (e.g., at the bladder port 410), and the other end of the fluid pipeline 402 can be joined to the fluid source component 520 (e.g., at the fluid source port 554A). One side or surface of the fluid pipeline 402 can extend along and be supported by the fluid pipeline support region 604A of the support component 600. Moreover, in such a structure, one end of the fluid pipeline 504 can be joined to the foot support bladder 400 (e.g., at the bladder port 412), and the other end of the fluid pipeline 504 can be joined to the fluid source component 520 (e.g., at the storage chamber port 512). One side or surface of the fluid pipeline 504 can extend along and be supported by the fluid pipeline support region 604B of the support component 600. Alternatively, as shown in FIGS. 9A and 9B, the fluid pipelines 402 and 504 can include multiple portions of a single fluid tube connector component 800. The fluid tube connector component 800 with the fluid pipelines 402 and 504 can be formed in a manner similar to forming a fluid-filled bladder (e.g., when formed as a bladder, such as the foot support bladder 400 and / or the fluid source component 520). As a more specific example, two sheets 800A and 800B (or one folded sheet) of thermoplastic elastomer material can be joined together by a seam 800S using heat sealing, welding, or other techniques. The size and shape of the support surface 402S of the fluid pipeline 402 portion can be designed to correspond to the size and shape of the fluid pipeline support region 604A of the support component 600. Similarly, the size and shape of the support surface 504S of the fluid pipeline 504 portion can be designed to correspond to the size and shape of the fluid pipeline support region 604B of the support component 600. The size, shape, and relative position of the seam 800S can be designed to correspond to the position of the ridge 604R of the support component 600. Figures 10A through 10C provide various views of fluid system 100 (with support member 600) without other footwear and / or sole structure parts to illustrate how the various fluid system 100 parts fit together. FIG. 10A is a top outer perspective view of fluid system 100, FIG. 10B is a bottom view, and FIG. 10C is an outer view. FIG. 10D is a perspective cross-sectional view taken generally along line 10D-10D in FIG. 10B, but FIG. 10D includes some additional sole structure 200 parts for a more complete context. As shown in these figures along with FIGS. 9A and 9B, fluid tube connector part 800 has a generally C-shape, for example including a first end, a second end, and a connecting portion extending between the first end and the second end (forming a tube for fluid lines 402 and 504). The connecting portion defines a concave chamber. The C-shape also accommodates the placement of foot support bladder 400 and fluid source part 520 in a vertically stacked relationship and allows fluid lines 402 and 504 to extend between foot support bladder 400 and fluid source part 520 without undesirably kinking or pinching closed. First midsole part 300 extends into and fits within space 100S defined between the ground-facing surface 400G of foot support bladder 400 and the upward-facing surface 500U of fluid source part 520. Fluid system 100 can be formed from multiple parts, such as separate parts for foot support bladder 400, fluid source part 520 (and optionally for each of pump 550 and fluid storage chamber 500), and fluid tube connector part 800. When formed as two or more separate parts, these parts can be fluidly connected to each other in any desired manner, such as by one or more of heat-sealed or welded joints, adhesives, mechanical connectors, etc. Alternatively, if desired, fluid tube connector part 800 or other fluid tubes (e.g., for fluid lines 402 and / or 504) can be integrally formed with one or more of the following: (a) foot support bladder 400, (b) fluid source part 520 (e.g., if fluid source part 520 constitutes a bladder part), (c) pump 550, and / or (d) fluid storage chamber 500 (e.g., if fluid storage chamber 500 is formed as a bladder part). In such structures, fluid lines 402 and / or 504 can be integrally formed as a single, unitary construction with one or more of the following: (a) foot support bladder 400, (b) fluid source part 520, (c) pump 550, and / or (d) fluid storage chamber 500. In addition, in the specific examples illustrated in FIGS. 10A - 10D (and other figures), the first fluid line 402 and the second fluid line 504 engage with or extend from the foot support bladder 400 at positions adjacent to each other on a first side (e.g., outer side, optionally in the midfoot region) of the foot support bladder 400. The foot support bladder 400 may include physical ports (e.g., bladder ports 410, 412) that are respectively connected to the fluid lines 402 and 504, or one or more of the fluid lines 402 and / or 504 may be integrally formed with the foot support bladder 400. Additionally or alternatively, in the specific examples illustrated in FIGS. 10A - 10D (and other figures), the first fluid line 402 and the second fluid line 504 engage with or extend from the fluid source component 520 at positions adjacent to each other on a first side (e.g., outer side, optionally in the midfoot region) of the fluid source component 520. The fluid source component 520 may include physical ports (e.g., reservoir ports 554A, 512) that are respectively connected to the fluid lines 402 and 504, or one or more of the fluid lines 402 and / or 504 may be integrally formed with the fluid source component 520. The fluid source component 520 may consist only of a fluid pump (e.g., like the foot - actuated pump 550, other manually - actuated pumps, battery - operated pumps or compressors, etc.), only of a fluid reservoir 500, or of a combined pump 550 / fluid reservoir 500 component as illustrated in these figures. FIGS. 11A and 11B provide perspective views of a switch component 900 according to some aspects of the present technology. The switch component 900 includes a front wall 900F, a rear wall 900R opposite the front wall 900F, an external surface 900X, and an internal surface 900I opposite the external surface 900X. The front wall 900F includes a front axial element 902F, and the rear wall 900R includes a rear axial element 902R. The front axial element 902F engages a corresponding front support hole 612F on the front switch support 610F of the support component 600. See FIGS. 6A - 6F. Similarly, the rear axial element 902R engages a corresponding rear support hole 612R on the rear switch support 610R of the support component 600. When engaged in this manner, the switch component 900 is capable of rotating relative to the support component 600 about the axis of the axial elements 902F and 902R. Figures 11A and 11B also show a front wall 900F including a front protrusion element 904F and a rear wall 900R including a rear protrusion element 904R. Depending on the rotational position of the switch member 900, the front protrusion element 904F can selectively engage one of the front support recesses 614F1 or 614F2 of the support member 600 (see FIGS. 6A to 6F and 8) (and move between the front support recesses 614F1 or 614F2). Similarly, depending on the rotational position of the switch member 900, the rear protrusion element 904R can selectively engage one of the rear support recesses 614R1 or 614R2 of the support member 600 (see FIGS. 6A to 6F and 8) (and move between the rear support recesses 614R1 or 614R2). The protrusion elements 904F, 904R and the support recesses 614F1, 614F2, 614R1, 614R2 can be used as a stop mechanism to illustrate holding the switch member 900 in a desired rotational position. Rotation of the switch member 900 about the axial elements 902F and 902R allows the switch member 900 to switch between two settings. In one setting, the top of the switch member 900 (above the axial elements 902F, 902R) rotates inwards, while the bottom of the switch member 900 (below the axial elements 902F, 902R) rotates outwards. In this first setting (or configuration), the front protrusion element 904F engages the front support recess 614F1, and the rear protrusion element 904R engages the rear support recess 614R1. The engagement of the front protrusion element 904F with the front support recess 614F1, and the engagement of the rear protrusion element 904R with the rear support recess 614R1 help to hold the switch member 900 in this set position. In this setting, both the fluid pipelines 402 and 504 are kept open, and the fluid system 100 is in the higher pressure configuration shown in FIG. 1B. In the second setting, the top of the switch member 900 (above the axial elements 902F, 902R) rotates outwards, and the bottom of the switch member 900 (below the axial elements 902F, 902R) rotates inwards about the axial elements 902F and 902R. In this second setting (or configuration), the front protrusion element 904F engages the front support recess 614F2, and the rear protrusion element 904R engages the rear support recess 614R2. The engagement of the front protrusion element 904F with the front support recess 614F2, and the engagement of the rear protrusion element 904R with the rear support recess 614R2 help to hold the switch member 900 in this set position. As shown in FIGS. 11A and 11B, in this exemplary structure, the inner surface 900I of the switch member 900 includes a switch support surface 906. In the illustrated example, the switch support surface 906 is only located near the tube support surface 908B that houses the fluid pipeline 504. Therefore, the switch support surface 906 can interact with the fluid pipeline 504. The switch support surface 906 does not extend to the tube support surface 908A that houses the fluid pipeline 402. Therefore, the switch support surface 906 does not interact with the fluid pipeline 402. When in the second setting, the top of the switch member 900 rotates outward, while the bottom of the switch member 900 rotates inward around the axial elements 902F and 902R, and the switch support surface 906 also rotates inward toward the fluid pipeline 504. This action causes the fluid pipeline 504 to be clamped and closed between the switch support surface 906 and the tube closure member 700. The element 906X in FIG. 10D shows the position where the switch support surface 906 will contact the fluid pipeline 504 (opposite to the position of the tube closure member 700) to close the fluid pipeline 504. In this way, the switch member 900 closes the fluid pipeline 504 (for example, clamps and closes it between the switch support surface 906 and the tube closure member 700), and places the fluid system 100 in the lower pressure configuration shown in FIG. 1A. According to the present technology, the switch member 900 can have any desired configuration, be formed of any number of parts, and / or be formed of any desired material. In the illustrated example, the switch member 900 can be formed as a single component from a rigid material, such as plastics (e.g., thermoplastic polyurethane, other thermoplastic elastomers, polyether block amide, metals, metal alloys, etc.). As some more specific examples, the switch member 900 can be made by an injection molding process, by another molding process, by a 3D printing process, etc. Although the specific combination of the switch member 900 and the switch support member 600 is described above, in some examples of the present technology, many other specific types of switches and switch devices can be used. For example, one or more of the recesses 614F1, 614F2, 614R1, and / or 614R2 on the support member 600 can be replaced by protrusions, and one or more of the corresponding protrusions 904F and / or 904R on the switch member 900 can be replaced by recesses. Different types of switches can also be used, such as a "button" toggle switch (instead of this type of rotary switch member 900), which moves the switch support surface 906 into contact or out of contact with the fluid pipeline 504. Additionally or alternatively, the switch member 900 can have an appearance that is substantially different from the illustrated specific example, such as different sizes, different shapes, different textures on its outer surface 900X, etc. Figures 12A through 12D respectively provide an outer view, an inner view, a top view, and a bottom view of a second midsole component 1000 that can be provided in a sole structure 200 according to at least some examples of the present technology. In the illustrated example, the second midsole component 1000 includes a single polymer foam component (e.g., composed of ethylene vinyl acetate (EVA) foam, polyurethane foam, etc.), but other materials (e.g., rubber, other elastomers, thermoplastic polyurethane, etc.) can also be used. Alternatively, if desired, the second midsole component 1000 can be made of two or more components, including: one or more polymer foam midsole components, one or more mechanical damping components, one or more fluid-filled bladders, one or more heel components, one or more forefoot components, one or more arch support portions, etc. The second midsole component 1000 includes an upward-facing surface 1000U and a ground-facing surface 1000G. An outer surface 1000L and an inner surface 1000M extend between the upward-facing surface 1000U and the ground-facing surface 1000G along two sides of the second midsole component 1000. These side surfaces 1000L and / or 1000M can have any desired size, shape, thickness, texture (e.g., including smooth walls, textured walls, combinations, etc.), decorative features, etc. The features shown in Figures 10A through 10D (and other figures) represent an example of a decorative design for the wall surface. The second midsole component 1000 also includes a forefoot tip 1000T and a rear heel end 1000H. Thus, the illustrated second midsole component 1000 spans under and / or supports all or substantially all (e.g., at least 90% or even at least 95% of the surface area) of the plantar surface of the wearer's foot. The second midsole component 1000 of this example also includes a protruding surface 1010 that is adapted to fit into a space defined by a midfoot connection portion 400M of the foot support bladder 400. In this example, the second midsole member 1000 is positioned such that its ground-facing surface 1000G covers the upward-facing surface 400U of the foot support bladder 400 (and optionally covers at least some of the upward-facing surface 300U of the first midsole member 300 - see FIG. 10D). As shown in FIG. 12D, the ground-facing surface 1000G of the second midsole member 1000 may include structures that match and / or accommodate corresponding structures provided on the foot support bladder 400 (e.g., midsole protrusions 1000P extending into seams or welds 404 of the foot support bladder 400) (e.g., one or more recesses 1000R and / or protrusions 1000P). As can be clearly seen from the recesses 1000R shown in FIG. 12D, in this example, the front edge 1000FE of the recess 1000R (and the front edge 400FE of the foot support bladder 400 in this example) will be located not far from the most forward toe region of the sole structure 200. In some examples, the front edges 1000FE and 400FE will be located between parallel planes at 0.55L and 0.85L (relative to the longitudinal length L of the second midsole member 1000, the entire sole structure 200, and / or the entire footwear article 250). FIGS. 13A through 14B illustrate example heel support members 1100L and 1100M that may be included in the sole structure 200 and / or the footwear article 250 in accordance with at least some examples of the present technology. Two separate heel support members are shown in the illustrated example, namely: an outer heel support member 1100L (FIGS. 13A and 13B) and an inner heel support member 1100M (FIGS. 14A and 14B). The heel support members 1100L, 1100M may extend upward along both sides of the upper 202 in the heel region to support both sides of the wearer's heel. Alternatively, if desired, a single heel support member may be provided, e.g., a rear heel element that joins the outer heel support member 1100L and the inner heel support member 1100M into a single member. Such a single heel support member may have the structure of a conventional heel counter known and used in the footwear art. One or more heel support members 1100L, 1100M of this type may be joined in the sole structure 200 and / or the footwear article 250 structure in any desired manner, any desired manner including by using adhesives, stitching seams, mechanical fasteners, etc. Although FIGS. 13A through 14B illustrate specific component structures, the outer heel support member 1100L and / or the inner heel support member 1100M may have a number of desired sizes, shapes, textures (e.g., including smooth walls, textured walls, combinations, etc.), decorative features, etc. The lines and grooves shown in FIGS. 13A through 14B (and other figures) represent some examples of decorative designs for the heel support members 1100L, 1100M. Figures 15A through 15C respectively illustrate a top outer perspective view, a top view, and a bottom view of an outsole component 1200 according to some examples of the present technology. The outsole component 1200 may be made of one or more components, and the one or more components may be made of any desired material, including materials that are conventionally known and used for footwear outsoles (e.g., rubber materials, thermoplastic polyurethane materials, foam materials, etc.). Additionally, without departing from the present technology, the outsole component 1200 may have any desired tread pattern, any desired type of attachment friction elements, and / or attachment friction element patterns (e.g., including cleats or studs, raised protrusions, recessed grooves, etc.), among others. As shown in FIGS. 15A and 15B, the upward-facing surface 1200G of the exemplary outsole component 1200 includes one or more of the following: (a) a base surface 1212 (e.g., for engaging a base region 602 of the support component 600), (b) a fluid line support region 1214 (e.g., for engaging and / or receiving at least a portion of the fluid source line 402A of the fluid source component 520), (c) a valve support region 1216 (e.g., for engaging and / or receiving at least a portion of the check valve 114), (d) a pump support region 1218 (e.g., a recessed region (e.g., a circular recess) for engaging and / or receiving at least a portion of the pump 550), (e) a valve support region 1220 (e.g., for engaging and / or receiving at least a portion of the check valve 118), (f) one or more protrusions 1222 (e.g., in the midfoot region and / or the forefoot region, configured to engage corresponding recesses 522 on the fluid storage chamber 500 (or other portions of the fluid source component 520)), and / or (g) a receiving portion 1224 for receiving at least a portion of the ground-facing surface 500G of the fluid source component 520 (e.g., at least a portion of the fluid storage chamber 500). In this way, one or more of the following: (a) the base region 602 of the support component 600, (b) the fluid source line 402A, (c) the check valve 114, (d) the pump 550, (e) the check valve 118, and / or (f) the recess 522 will be located between corresponding support structures provided on (i) the upward-facing surface 1200U of the outsole component 1200 and (ii) the ground-facing surface 300G of the first midsole component 300 (e.g., sandwiched therebetween) (see FIG. 3D). The base surfaces 312 and 1212 can support and hold the base region 602 of the support member 600, and the base region 602 can be fixed to the base surfaces 312 and / or 1212 by one or more of adhesives, mechanical fasteners, fusion techniques (such as welding techniques, melt bonding techniques, hot melt techniques, etc.). The fluid pipeline support regions 314 and 1214 can support and hold the fluid source pipeline 402A, and the fluid source pipeline 402A can be fixed to the fluid pipeline support regions 314 and / or 1214 by one or more of adhesives, mechanical fasteners, fusion techniques, etc. The valve support regions 316 and 1216 can support and hold the check valve 114 (or the check valve 114 region of the fluid source component 520), and the check valve 114 (or the check valve 114 region of the fluid source component 520) can be fixed to the valve support regions 316 and / or 1216 by one or more of adhesives, mechanical fasteners, fusion techniques, etc. The pump support regions 318 and 1218 can support and hold the pump 550, and the pump 550 can be fixed to the pump support regions 318 and / or 1218 by one or more of adhesives, mechanical fasteners, fusion techniques, etc. The valve support regions 320 and 1220 can support and hold the check valve 118 (or the check valve 118 region of the fluid source component 520), and the check valve 118 (or the check valve 118 region of the fluid source component 520) can be fixed to the valve support regions 320 and / or 1220 by one or more of adhesives, mechanical fasteners, fusion techniques, etc. The protrusions 322 and 1222 can be received in the corresponding recesses 522, and the protrusions 322 and / or 1222 can be fixed within the recesses 522 by one or more of adhesives, mechanical fasteners, fusion techniques, etc. The upward-facing surface 500U of the fluid source component 520 can be adapted to and / or fixed within the recess 324 of the ground-facing surface 300G of the first midsole component 300 (e.g., by one or more of adhesives, mechanical fasteners, fusion techniques, etc.). Similarly, the ground-facing surface 500G of the fluid source component 520 can be adapted to and / or can be fixed within the receiving portion 1224 of the upward-facing surface 1200U of the outsole component 1200 (e.g., by one or more of adhesives, mechanical fasteners, fusion techniques, etc.). Figures 15A and 15B also illustrate that the front edge 1224F of the receiving portion 1224 is located at a position slightly rearward from the foremost toe region of the outsole member 1200. As some more specific examples, based on the longitudinal length L of the sole structure 200 and / or the entire footwear article 250, the foremost extent of the front edge 1224F of the receiving portion 1224, the foremost extent of the fluid source member 520, and / or the foremost extent of the fluid storage chamber 500 may be positioned such that: (a) in front of a parallel plane located at P = 0.55L (and in some examples, in front of a parallel plane located at P = 0.6L or in front of a parallel plane located at P = 0.65L), and (b) behind a parallel plane located at P = 0.85L (and in some examples, behind a parallel plane located at P = 0.8L or behind a parallel plane located at P = 0.75L). In at least some portions of the forefoot region of the exemplary sole structure 200, the upward-facing surface 1200U will contact and be fixed to the ground-facing surface 300G of the first midsole member 300 (e.g., by one or more of adhesives, mechanical fasteners, fusion techniques, stitching seams, etc.). Figures 15A through 15C also illustrate other features of the pump actuator region of the outsole member 1200. In addition to the pump support region 1218 having a bulbous inner surface that generally corresponds to the lower portion of the outer surface shape of the pump 550, the interior of the pump support region 1218 includes a raised actuator structure 1218A that pushes inwardly against the outer surface of the pump 550. The raised actuator structure 1218A: (i) helps ensure direct contact between the outer surface of the pump 550 and the outsole member 1200, and (ii) directly compresses the pump 550 when a contact force is applied to the ground-facing surface 1200G of the outsole member 1200 at the pump actuator member 1300. In this way, the pump 550 will immediately move fluid when any compression is applied to the sphere of the pump 550, and each pump cycle will move a relatively large amount of fluid. Figure 15C (along with FIGS. 2A, 2B, 2D, and 2E) shows that the ground-facing surface 1200G of the outsole member 1200 includes an outwardly extending surface 1218G at the pump support region 1218. The outwardly extending surface 1218G is directly located beneath the pump 550 in the entire sole structure 200 and may have a generally circular shape. In at least some examples of the present technology, the pump actuator member 1300 may be engaged with the outwardly extending surface 1218G (e.g., by one or more of an adhesive, mechanical fasteners, fusion techniques, etc.). FIGS. 16A through 16C respectively provide a bottom view, a top view, and a perspective view of an example pump actuator member 1300 that can be secured with the outwardly extending surface 1218G of the pump support region 1218. The upward-facing surface 1300U of the pump actuator member 1300 may have a shape that matches at least a portion of the outer shape of the outwardly extending surface 1218G (e.g., a generally circular shape). The ground-facing surface 1300G of the pump actuator member 1300 may have any desired shape. In some examples, the ground-facing surface 1300G may include one or more attachment friction elements 1300T (having any desired size, shape, quantity, and / or configuration). The pump actuator member 1300 may be made of any desired material, including wear-resistant materials, abrasion-resistant materials, etc., including known and materials used in footwear outsole construction. The pump actuator member 1300 may provide additional protection to help prevent unwanted piercing of the fluid system 100 (e.g., by debris extending through the outsole member 1200 at the pump support region 1218). In some examples of the present technology, the pump actuator component 1300 may be located on the outsole component 1200, the sole structure 200, and / or the footwear article 250: (a) behind a parallel plane located at 0.4L, and in some examples, behind a parallel plane located at 0.35L or 0.3L, and / or (b) in front of a parallel plane located at 0.1L, and in some examples, in front of a parallel plane located at 0.12L or 0.15L. See also FIG. 2A. Thus, in some examples, the pump actuator component 1300 will be located in the heel region of the sole structure 200 and / or the footwear article 250. Additionally or alternatively, if desired, a pump (e.g., similar to pump 550) and a pump actuator component (e.g., of the type described with respect to pump actuator component 1300) may be provided in the forefoot region (and / or midfoot region) of the sole structure 200 and / or the footwear article 250. FIG. 15C includes a broken line 1310 to illustrate a possible location of a forefoot-based pump and / or pump actuator component, e.g., as an alternative to a heel-based location or as a second pump (e.g., connected in series with pump component 550 (e.g., of the type described in U.S. Patent No. 11,510,458 B2, which is incorporated herein by reference in its entirety)). When provided in the forefoot, the pump actuator component 1300 (and corresponding pump structure) may be located on the outsole component 1200, the sole structure 200, and / or the footwear article 250: (a) behind a parallel plane located at 0.95L, and in some examples, behind a parallel plane located at 0.92L or 0.9L, and / or (b) in front of a parallel plane located at 0.55L, and in some examples, in front of a parallel plane located at 0.58L or 0.6L. Figures 17A through 20B illustrate features of another example fluid system 1700, a foot support system, a sole structure, and / or a footwear product in accordance with some aspects of the present technology. In the examples of FIGS. 1A through 16C above, the pump 550 is arranged to draw fluid from the foot support bladder 400 and pump the fluid to the fluid storage chamber 500. In this manner: (a) when the fluid system 100 (e.g., fluid line 504) is in a closed configuration, the fluid pressure in the foot support bladder 400 decreases as the wearer steps down, thereby activating the pump 550 and transferring fluid to the fluid storage chamber 500, and (b) when the fluid system 100 (e.g., fluid line 504) is in an open configuration, the fluid pressures in the foot support bladder 400 and the fluid storage chamber 500 are equal and fluid freely transfers around the fluid system 100. However, in the fluid system 1700 of FIGS. 17A through 20B, as will be described in more detail below: (a) when the fluid system 1700 (e.g., fluid line 1766) is in a closed configuration, the fluid pressure in the fluid storage chamber 1720 decreases as the wearer steps down, thereby activating the pump 1730 and transferring fluid to the foot support bladder 1710, and (b) when the fluid system 1700 (e.g., fluid line 1766) is in an open configuration, the fluid pressures in the foot support bladder 1710 and the fluid storage chamber 1720 are equal and fluid freely transfers around the fluid system 100. Thus, the fluid system 1700 in the schematic diagrams of FIGS. 17A and 17B can be considered to be substantially similar to the fluid system 100 in the schematic diagrams of FIGS. 1A and 1B, except that the foot support bladder 400 / 1710 and the fluid storage chamber 500 / 1720 have exchanged positions. Additionally or alternatively, the combined fluid source component 520 of FIG. 19 (e.g., including the pump 1730 and the fluid storage chamber 1720) is substantially similar to the combined fluid source component 520 of the fluid system 100 described with respect to FIGS. 5A through 5D, except that the pump 1730 and the check valves 1750 and 1752 (e.g., one-way valves) are oriented to pump fluid in the opposite direction (e.g., from the fluid storage chamber 1720 to the foot support bladder 1710). The fluid system 1700 of FIGS. 17A through 20B (including the fluid storage chamber 1720, the pump 1730, the combined fluid source component 520, and / or the foot support bladder 1710) can be included in a sole structure 200 and / or a footwear product 250 having an upper 202, a first midsole component 300, a support component 600, a tube closure component 700, a fluid tube connector component 800, a switch component 900, a second midsole component 1000, one or more heel support components 1100L and / or 1100M, an outsole component 1200, and / or a pump actuator component 1300 having any of the various features, options, and / or alternatives described above with respect to these components shown in FIGS. 1A through 16C. The example fluid system 1700 will now be described in more detail with reference to the schematic diagrams shown in FIGS. 17A and 17B. The fluid system 1700 can be incorporated into a foot support system (e.g., a sole structure) and / or a footwear article in various ways, e.g., in any manner and / or using any of the structures and / or components described in more detail above. The example fluid system 1700 is a “closed system,” e.g., the fluid system 1700 has a fixed amount (e.g., mass) of fluid (e.g., a gas such as air or other gas, including gases commonly known and used in foot support bladder systems) sealed therein, and the fluid system 1700 does not introduce new fluid from the external environment and does not discharge fluid to the external environment. However, alternatively, at least some aspects of the present technology can be used in an “open” fluid system, e.g., a fluid system that introduces air (or other gas) from the external environment and / or discharges air (or other gas) to the external environment to vary the foot support pressure in a foot support bladder. FIG. 17A shows the fluid system 1700 in a "high pressure" foot support configuration, while FIG. 17B shows the fluid system 1700 in a "low pressure" foot support configuration. As shown in these figures, the fluid system 1700 includes a foot support bladder 1710 (which may have any of the various features, structures, and / or options described above for the foot support bladder 400). Additionally, the fluid system 1700 includes a fluid storage chamber 1720 (which may include a fluid-filled bladder or other fluid container, such as having any of the various features, structures, and / or options described above for the fluid storage chamber 500). A pump 1730 (e.g., a foot-activated pump, such as a ball-type pump) moves fluid from the fluid storage chamber 1720 to the foot support bladder 1710. When the switch component 1740 is closed, as shown in FIG. 17A, the pump 1730 moves fluid out of the fluid storage chamber 1720 and into the foot support bladder 1710 to place the foot support bladder 1710 in a higher pressure foot support configuration. Specifically, compression of the internal chamber 1730C of the pump 1730 (e.g., in response to the user's footsteps) forces fluid toward the pump outlet 1732, and the check valve 1750 prevents fluid from flowing back from the pump 1730 to the fluid storage chamber 1720 via the fluid line 1760. As long as the pressure generated by the compression of the pump 1730 is greater than the pressure in the foot support bladder 1710, the fluid will move through the fluid line 1762, through the check valve 1752, through the fluid line 1764, and into the internal chamber 1710C of the foot support bladder 1710 (e.g., through the foot support bladder inlet port 1712). Alternatively, the fluid line 1762 may be omitted or may be very short such that the pump outlet 1732 supplies fluid substantially directly to the check valve 1752, and / or the check valve 1752 may be directly connected to the fluid source component outlet port 520O (e.g., the outlet port of the fluid source component 520). When the internal chamber 1730C of the pump 1730 expands again (e.g., when the user lifts his / her foot off the contact surface), fluid is drawn out of the internal chamber 1720C of the fluid storage chamber 1720, enters the fluid line 1760 through the storage chamber outlet port 1722, and enters the internal chamber 1730C of the pump 1730 (via the check valve 1750 and the pump inlet 1734). The dashed line labeled 520 in FIGS. 17A and 17B outlines components that may be included within the fluid source component 520, which will be discussed in more detail below in connection with FIG. 19. The fluid source component 520 may have the same general structure, features, options, and alternatives as the fluid source component 520 described above in connection with FIGS. 5A-5D (except that, as described above, the pump 1730 and the check valves 1750, 1752 are oriented to transport fluid in a direction opposite to the direction described in connection with FIGS. 5A-5D). In the configuration shown in FIG. 17A: (i) The closed switch member 1740 (which may have the switch members and structures described above in connection with FIGS. 6A-11B) prevents fluid from moving from the foot support bladder 1710 to the fluid storage chamber 1720 via the fluid line 1766, and (ii) The check valve 1752 prevents fluid from flowing from the foot support bladder 1710 to the pump 1730 via the fluid line 1762. Thus, in this configuration, over time (e.g., after one or more step cycles), by activating the pump 1730, fluid will move from the fluid storage chamber 1720 to the foot support bladder 1710, thereby placing the foot support bladder 1710 under a higher pressure than the fluid storage chamber 1720. This action and configuration place the exemplary foot support bladder 1710 in a higher pressure foot support configuration. When the switch member 1740 is opened, as shown in FIG. 17B, this opens the fluid line 1766 and allows fluid to flow from the foot support bladder 1710 to the fluid storage chamber 1720 via the fluid line 1766 (e.g., the fluid flows between the foot support bladder outlet port 1714 and the fluid source component inlet port 520I (the inlet of the fluid source component 520, which may lead directly to the interior chamber 1720C of the fluid storage chamber)). This switching action equalizes the pressure in the interior chamber 1710C of the foot support bladder 1710 and the interior chamber 1720C of the fluid storage chamber 1720, e.g., thereby reducing the pressure in the interior chamber 1710C and increasing the pressure in the interior chamber 1720C. This action and configuration place the exemplary foot support bladder 1710 in a lower pressure foot support configuration. In use, when the user depresses the pump 1730 in the configuration shown in FIG. 17B, fluid will freely flow around the loop - from the pump 1730, through the fluid line 1764, into the foot support bladder 1710, through the fluid line 1766, into the fluid storage chamber 1720, through the fluid line 1760 and back into the pump 1730. FIG. 18 provides a top view of the foot support bladder 1710 that can be used in at least some examples of the fluid system 1700. The foot support bladder 1710 can have any of the same general structures, features, options, and alternatives as the foot support bladder 400 described above in connection with FIGS. 4A-4D, except that: (i) The bladder ports 410 of FIGS. 4A-4D serve as outlet ports, while the corresponding foot support bladder inlet port 1712 serves as a fluid inlet port, and (ii) The bladder ports 412 of FIGS. 4A-4D serve as inlet ports, while the corresponding foot support bladder outlet port 1714 serves as a fluid outlet port. Where the same reference numerals are used in FIG. 18 as in FIGS. 4A-4D, reference is made to the same or similar parts and / or features, and many overlapping descriptions may be omitted. The foot support bladder 1710 can be formed of a thermoplastic elastomeric material (e.g., two sheets, a folded sheet, etc.) in a manner that is commonly known and used in the footwear art. The illustrated example foot support bladder 1710 includes an upward-facing surface 400U, a ground-facing surface 400G (e.g., see FIG. 4C), and a sealed peripheral seam 400S, where the sheets forming the surfaces 400U, 400G are welded, heat-sealed, and / or otherwise joined together. The internal chamber 1710C (described above in connection with FIGS. 17A and 17B) is defined between the upward-facing surface 400U and the ground-facing surface 400G and inside the sealed peripheral seam 400S. One or more internal seams or welds 404 (one is shown in the example of FIG. 18) can be provided, for example, to control the shape of the foot support bladder 1710 when inflated. In accordance with the present technology, the foot support bladder 1710 can have various shapes and / or sizes. In the illustrated example, the foot support bladder 1710 includes: (i) a heel region 1710H (e.g., which supports at least 50% of the surface area of the wearer's heel), (ii) a forefoot region 400F (e.g., which supports at least 50% of the surface area of the wearer's forefoot), and (iii) a midfoot connection portion 400M, which is narrower and offset toward the outer side of the foot support bladder 400 compared to the heel region 400H and the forefoot region 400F. The internal chamber 1710C of the illustrated example foot support bladder 1710 extends continuously between the heel region 400H and the forefoot region 400F through the midfoot connection portion 400M. In fact, the internal chamber 1710C of the illustrated example foot support bladder 400 extends continuously throughout the foot support bladder 1710 (except at any internal welds 404 and / or recesses), such that the entire internal chamber 1710C is in fluid communication. FIG. 18 also shows that the exemplary foot support bladder 1710 includes a foot support bladder inlet port 1712 that will be connected to a fluid line 1764 that supplies fluid from a pump 1730 to an internal chamber 1710C of the foot support bladder 1710. Additionally, the exemplary foot support bladder 1710 includes a foot support bladder outlet port 1714 that will be connected to a fluid line 1766 that extends between an internal chamber 1720C of a fluid storage chamber 1720 and the internal chamber 1710C of the foot support bladder 1710 and connects the internal chamber 1720C of the fluid storage chamber 1720 with the internal chamber 1710C of the foot support bladder 1710. In the illustrated example, the foot support bladder inlet port 1712 and the foot support bladder outlet port 1714 are located on a side edge of the foot support bladder 1710 (e.g., adjacent to each other at an outer side edge in the midfoot connection portion 400M), and they may be positioned at or within a receiving portion 310 of a first midsole member 300 in a final assembled sole structure 200. The enlarged arrow 1780 shown in FIG. 18 illustrates the direction of fluid flow relative to the foot support bladder 1710 in the exemplary fluid system 1700. FIG. 19 provides a top view of a fluid source component 520 having a combined fluid storage chamber 1720 (e.g., a container) and pump 1730 components that may be used in at least some instances of the fluid system 1700. The fluid source component 520 may have any of the same general structures, features, options, and alternatives as the fluid source component 520 described above in connection with FIGS. 5A - 5D, except that: (i) the pump 1730 and check valves 1750 and 1752 operate to move fluid in a direction opposite to that of the examples of FIGS. 5A - 5D, (ii) the fluid source port 554A (FIGS. 5A - 5D) serves as an inlet port, while the corresponding fluid source component outlet port 520O serves as a fluid outlet port, and (iii) the storage chamber port 512 (FIGS. 5A - 5D) serves as an outlet port, while the corresponding fluid source component inlet port 520I serves as a fluid inlet port. Where the same reference numerals are used in FIG. 19 as in FIGS. 5A - 5D, reference is made to the same or similar parts and / or features, and many overlapping descriptions may be omitted. FIG. 19 provides a top view of an example fluid source component 520 (e.g., including a combined pump 1730 and fluid reservoir 1720) that can be used in accordance with some examples of the present technology. Any desired type of fluid source component 520 (e.g., a fluid container) can be used in examples of the present technology. However, in the illustrated example, the fluid source component 520 constitutes a fluid-filled bladder, e.g., formed of a thermoplastic elastomer material (e.g., two sheets, a folded sheet, etc.) in a manner commonly known and used in the footwear industry. The illustrated example fluid source component 520 includes an upward-facing surface 500U, a ground-facing surface 500G (see FIG. 5D), and a sealed peripheral seam 500S, where the sheets forming the surfaces 500U, 500G are welded, heat-sealed, and / or otherwise joined together. An internal chamber 1720C (described above in connection with FIGS. 17A and 17B) is defined between the upward-facing surface 500U and the ground-facing surface 500G and inside the sealed peripheral seam 500S. One or more internal seams, welds, or recesses 522 can be provided, e.g., to control the shape of the fluid source component 520 and / or to form additional components within the fluid source component 520, which will be described in more detail below. In accordance with the present technology, the fluid source component 520 can have various shapes and / or sizes. In the illustrated example, the fluid source component 520 includes: (i) a heel region 500H (e.g., which supports at least 50% (and in some embodiments, at least 75%)) of the surface area of the wearer's heel), (ii) a forefoot region 500F (e.g., which supports at least 15% (and in some embodiments, at least 20% or at least 25%)) of the surface area of the wearer's forefoot), and (iii) a midfoot portion 500M between the heel region 500H and the forefoot region 500F. The internal chamber 1720C of the illustrated example fluid source component 520 extends continuously between the heel region 500H and the forefoot region 500F through the midfoot portion 500M. In fact, the internal chamber 1720C of the illustrated example fluid source component 520 extends continuously throughout the fluid source component 520 (except at any internal welds 520W and / or recesses 522). The entire structure of the fluid source component 520 of this example actually constitutes two parts of the entire fluid system 1700 described above in connection with FIGS. 17A and 17B: the pump 1730 and the fluid storage chamber 1720. The sealed or welded pipeline 520W defines one or more of the following: (a) a fluid pipeline 1760 extending from the fluid storage chamber 1720 to the check valve 1750 area, (b) the check valve 1750 area, (c) the pump 1730 (e.g., formed as a foot-activated compressible spherical type pump), (d) the pump inlet 1734 area, (e) the pump outlet 1732 area, (f) the check valve 1752 area, (g) the internal fluid pipeline 1768, and / or (h) the fluid source component outlet port 520O (which can be connected to the fluid pipeline 1764 that supplies fluid to the foot support bladder 1710). The sealed or welded pipeline 520W at the upward-facing surface 500U shown in FIG. 19 can match the features (e.g., of the type shown in FIG. 3D) at the ground-facing surface 300G of the first midsole component 300. More specifically: (a) at least a portion of the internal fluid pipeline 1768 of the fluid source component 520 matches the position of the fluid pipeline support area 314 of the first midsole component 300, (b) the check valve 1750 area matches the position of the valve support area 320, (c) the pump 1730 area matches the position of the pump support area 318, and (d) the check valve 1752 area matches the position of the valve support area 316. The overall contour (e.g., the outer periphery) of the fluid source component 520 can be shaped to fit into the recess 324 provided in the ground-facing surface 300G of the first midsole component 300 shown in FIG. 3D. FIG. 19 also illustrates that the exemplary fluid source component 520 includes an inlet port 520I that will be connected to the fluid pipeline 1766, which transfers fluid between the internal chamber 1710C of the foot support bladder 1710 and the internal chamber 1720C of the fluid storage chamber 1720. Additionally, the exemplary fluid source component 520 includes an outlet port 520O that will be connected to the fluid pipeline 1764 to move fluid from the fluid source component 520 (e.g., from the pump 1730) to the foot support bladder 1710. In the illustrated example, the fluid source component inlet port 520I and the fluid source component outlet port 520O are located on the side edges of the fluid source component 520 (e.g., adjacent to each other at the outer side edge), and they can be positioned within the receiving portion 310 of the first midsole component 300 in the finally assembled sole structure 200. The enlarged arrow 1780 shown in FIG. 19 illustrates the direction of fluid flow through the fluid source component 520 in this exemplary fluid system 1700. As shown in FIG. 19, in this example, the fluid source component inlet port 520I and the fluid source component outlet port 520O are located within a recessed notch 508 formed in the outer side of the fluid source component 520 (e.g., at the inner wall 508W). The recessed notch 508 can generally correspond in size, shape, and / or position to the receiving portion 310 in the first midsole component 300 and can be configured to accommodate the support component 600. FIG. 19 also shows one or more recesses 522 formed in the fluid source component 520 (e.g., formed in the fluid storage chamber 1720 portion of the fluid source component 520). These recesses 522 can be formed as internal solder joints, e.g., where the inner surface of the upward-facing surface 500U is fixed (e.g., welded, bonded, etc.) to the inner surface of the ground-facing surface 500G. The recesses 522 in the fluid source component 520 can be positioned to correspond to the positions of corresponding protrusions 322 provided in the ground-facing surface 300G of the first midsole component 300. Although FIG. 19 shows a staggered pattern of recesses 522 in three rows oriented left and right in the midfoot region and / or forefoot region of the fluid source component 520, any desired number of recesses, number of rows, number of columns, size, shape, orientation, and / or arrangement of the recesses (or other engaging components) can be used in other specific examples of this technology. Additionally or alternatively, if desired, one or more of the recesses 522 shown in FIG. 19 can be replaced with protrusions, the size, shape, and / or position of which are designed to engage corresponding recesses provided in the ground-facing surface 300G of the first midsole component 300. Thus, various surface engagements between the ground-facing surface 300G of the first midsole component 300 and the upward-facing surface 500U of the fluid source component 520 can be used without departing from this technology. The foot support bladder 1710 and fluid source component 520 shown in FIGS. 18 and 19 can be incorporated into the footwear article 250 and sole structure 200 described above in connection with FIGS. 1A-16C (in place of the foot support bladder 400 and fluid storage chamber 500). In such footwear articles 250 and sole structures 200, the same switch system components (e.g., 600, 700, 900) as shown in FIGS. 6A-11B can be used. Additionally or alternatively, if desired, the fluid lines 1764 and 1766 of FIGS. 17A and 17B can have any of the structures, features, options, and / or alternatives described above for the fluid lines 402 and 504. As some more specific examples, if desired, the fluid lines 1764 and 1766 can engage a support component 600 of the type described above in connection with FIGS. 6A-8 and can interact with the switch component 900 in the same manner described above in connection with FIGS. 11A and 11B. Still additionally or alternatively, if desired, the fluid lines 1764 and 1766 can form portions of a single fluid tube connector component 800 of the type described above in connection with FIGS. 9A and 9B, e.g., replacing the fluid line 402 with the fluid line 1764 and replacing the fluid line 504 with the fluid line 1766. As described above, aspects of the present technology include a switch system 1740 that is configured to change the fluid line 1766 between an open configuration and a closed configuration and / or change the foot support system, sole structure 200, and / or footwear article 250 between a higher pressure foot support configuration (e.g., the fluid line 1766 is in a closed configuration) and a lower pressure foot support configuration (e.g., the fluid line 1766 is in an open configuration). In the closed configuration (or higher pressure foot support configuration), the switch system 1740 can include a switch component 900 having a support surface 906 (e.g., a protrusion) that is movable to clamp the fluid line 1766 closed against a tube closure component 700, e.g., as described above in connection with the closure of the fluid line 504 in FIGS. 6A-11B. FIGS. 20A and 20B provide cross-sectional views of a footwear article 250 in accordance with some aspects of the present technology, the footwear article 250 having a fluid system 1700 of the type described above in connection with FIGS. 17A-19. FIG. 20A shows the fluid line 1766 in an open configuration (lower pressure foot support configuration), and FIG. 20B shows the fluid line 1766 in a closed configuration (higher pressure foot support configuration). Where FIGS. 20A and 20B use the same element symbols as other figures, like or similar parts are referenced (including the various structural features, options, and / or alternatives discussed above), and many overlapping descriptions may be omitted. As described above, when the fluid line 1766 is in the closed configuration, the pump 1730 moves fluid from the fluid storage chamber 1720 via the fluid line 1764 to the foot support bladder 1710. Since the return fluid line 1766 is closed, this pumping action increases the fluid pressure in the foot support bladder 1710 (because the check valve 1752 prevents fluid from returning to the pump 1730) and decreases the fluid pressure in the fluid storage chamber 1720. Thus, walking while wearing the footwear may cause an increase in pressure in the foot support bladder 1710. In some examples of the present technology, after a sufficient number of pump 1730 cycles have been completed (e.g., after sufficient steps have been taken to activate the foot-actuated pump 1730), this pumping action and the movement of fluid when the fluid line 1766 is in the closed configuration will result in: (i) a decrease in the height dimension of the fluid storage chamber 1720 and / or collapse of the fluid storage chamber 1720 (when fluid is pumped out of it) and / or (ii) a decrease in the height dimension of the entire sole structure 200 and / or the footwear article 250. Compare H1 and H3 (FIG. 20A) with H2 and H4 (FIG. 20B), respectively. Thus, when transitioning from a lower-pressure foot support configuration (P(low) in FIG. 20A) to a higher-pressure foot support configuration (P(high) in FIG. 20B), the fluid system 1700, the sole structure 200, and the footwear article 250 will transition from the configuration shown in FIG. 20A to the configuration shown in FIG. 20B. Since the movement of fluid occurs incrementally with each step, the decrease in height dimension and / or the change in foot support pressure can be relatively smooth. In some cases, the wearer of the footwear article 250 and / or others may not easily perceive this decrease in height dimension step by step, although the overall decrease in height dimension may be visually perceivable over time (e.g., after a series of steps). On the other hand, when the switch member 1740 is changed to open the fluid line 1766 (e.g., by the user's interaction with the switch member 1740), the fluid system 1700, the sole structure 200, and the footwear article 250 of the present example equalize the pressure in the foot support bladder 1710 and the fluid storage chamber 1720 as fluid moves from the foot support bladder 1710 into the fluid storage chamber 1720. This action causes a change from the configuration shown in FIG. 20B to the configuration shown in FIG. 20A. Thus, this movement of fluid (with the fluid line 1766 open) will result in: (i) an increase in the height dimension of the fluid storage chamber 1720 and / or reinflation of the fluid storage chamber 1720 (when fluid returns to it), and / or (ii) an increase in the height dimension of the entire sole structure 200 and / or the footwear article 250. Compare H2 and H4 (FIG. 20B) with H1 and H3 (FIG. 20A), respectively. In some examples of the present technology, the opening of fluid line 1766 can cause fluid to rapidly transfer from the foot support bladder 1710 to the fluid storage chamber 1720 because the pressure differential (higher pressure in the foot support bladder 1710) and the open fluid line 1766 will cause the system to equalize the pressure. This rapid transition from a higher pressure foot support configuration to a lower pressure foot support configuration can be perceived by the wearer in at least two ways. Specifically: (i) the wearer can feel that the foot support bladder 1710 under the foot becomes softer (as its pressure decreases), (ii) the wearer can feel a noticeable "bulge" as the height dimension of the fluid storage chamber 1720 increases, and / or (iii) the wearer (or someone else) can visually observe a noticeable change in the height dimension. For example, depending on the size of the fluid line 1766, these noticeable changes can occur substantially transiently when the fluid line 1766 is opened (e.g., in less than one or two seconds). The height difference between H1 and H2 (where in the illustrated example, H1 is greater than H2) can be within any one or more of the following ranges: at least 3 mm; at least 5 mm; at least 8 mm; at least 10 mm; at least 12 mm; at least 15 mm; at least 20 mm; between 3 mm and 35 mm; between 3 mm and 30 mm; between 3 mm and 25 mm; between 5 mm and 35 mm; between 5 mm and 30 mm; between 5 mm and 25 mm; between 8 mm and 35 mm; between 8 mm and 30 mm; between 8 mm and 25 mm; between 10 mm and 35 mm; between 10 mm and 30 mm; and / or between 10 mm and 25 mm. Any one or more of these same height difference ranges can also be provided between H3 and H4 (where in the illustrated example, H3 is greater than H4). As used herein, the terms "higher pressure foot support configuration" and "lower pressure foot support configuration" mean that the pressures are higher and lower relative to each other (e.g., the "higher pressure foot support configuration" is at a higher pressure than the "lower pressure foot support configuration", and the "lower pressure foot support configuration" is at a lower pressure than the "higher pressure foot support configuration"). Although other ranges are possible, in some examples of the present technology, the "lower pressure foot support configuration" can place the foot support bladders 400, 1710 at a pressure less than 20 psi, less than 15 psi, less than 12 psi, between 8 psi and 20 psi, and / or between 10 psi and 20 psi. Additionally or alternatively, although other ranges are possible, in some examples of the present technology, the "higher pressure foot support configuration" can place the foot support bladders 400, 1710 at a pressure of at least 15 psi, at least 18 psi, at least 20 psi, at least 25 psi, at least 28 psi, between 15 psi and 35 psi, between 18 psi and 35 psi, and / or between 20 psi and 30 psi. Further: (i) the terms "higher pressure foot support configuration" and "high pressure foot support configuration" may be used interchangeably in this specification, and (ii) the terms "lower pressure foot support configuration" and "low pressure foot support configuration" may be used interchangeably in this specification. III. Conclusion The present technology has been disclosed above and in the figures with reference to various embodiments. However, the purpose of this disclosure is to provide examples of various features and concepts related to the present technology, rather than to limit the scope of the claimed invention. Those skilled in the relevant art will recognize that various changes and modifications can be made to the above embodiments without departing from the scope of the claimed invention as defined by the appended claims. To avoid doubt, this application at least includes the subject matter described in the following numbered clauses: Clause 1. A fluid system for a footwear product, comprising: (A) a foot support bladder; (B) a fluid storage chamber; (C) a pump, the pump including an inlet and an outlet, the outlet supplying fluid to the foot support bladder; (D) a first fluid pipeline that places the fluid storage chamber in fluid communication with the inlet of the pump; and (E) a second fluid pipeline that places the foot support bladder in fluid communication with the fluid storage chamber. Clause 2. The fluid system according to Clause 1, further comprising: (A) a third fluid pipeline that places the pump in fluid communication with the foot support bladder; and (B) a fluid pipeline support member located on a first side of the fluid system, the fluid pipeline support member engaging a first surface of the third fluid pipeline. Clause 3. The fluid system according to Clause 2, wherein the fluid pipeline support member includes a first outer concave surface that engages the first surface of the third fluid pipeline. Clause 4. The fluid system according to Clause 1, further comprising: a fluid pipeline support member located on a first side of the fluid system, the fluid pipeline support member engaging a first surface of the second fluid pipeline. Clause 5. The fluid system according to Clause 4, wherein the fluid pipeline support member includes a first outer concave surface that engages the first surface of the second fluid pipeline. Clause 6. The fluid system according to Clause 1, further comprising: (A) a third fluid pipeline that places the pump in fluid communication with the foot support bladder; and (B) a fluid pipeline support member located on a first side of the fluid system, the fluid pipeline support member engaging a first surface of the second fluid pipeline and a first surface of the third fluid pipeline. Clause 7. The fluid system according to Clause 6, wherein the fluid pipeline support member includes a first outer concave surface and a second outer concave surface, the first outer concave surface engaging the first surface of the second fluid pipeline, and the second outer concave surface engaging the first surface of the third fluid pipeline. Clause 8. The fluid system according to Clause 7, wherein the first outer concave surface is positioned adjacent to the second outer concave surface. Clause 9. The fluid system according to Clause 8, wherein the first outer concave surface is in front of the second outer concave surface in the longitudinal direction of the fluid system. Clause 10. The fluid system according to any one of Clauses 6 to 9, wherein the second fluid pipeline and the third fluid pipeline include multiple portions of a single fluid pipeline component. Clause 11. The fluid system according to Clause 10, wherein the single fluid pipeline component includes: a first end, a second end, and a connecting portion extending between the first end and the second end. Clause 12. The fluid system according to Clause 11, wherein the connecting portion defines a concave chamber. Clause 13. The fluid system according to any one of Clauses 4 to 11, further comprising: a switch configured to change the second fluid pipeline between an open configuration and a closed configuration. Clause 14. The fluid system according to Clause 13, wherein the switch engages the fluid pipeline support member. Clause 15. The fluid system according to Clause 13 or 14, wherein the switch includes a protrusion that is movable to clamp the second fluid line when the switch places the second fluid line in the closed configuration. Clause 16. The fluid system according to Clause 2 or 3, wherein the second fluid line and the third fluid line include multiple portions of a single fluid line component. Clause 17. The fluid system according to Clause 16, wherein the second fluid line and the third fluid line engage or extend from the foot support bladder at positions adjacent to each other on a first side of the foot support bladder. Clause 18. The fluid system according to Clause 16 or 17, wherein the pump and the fluid storage chamber include multiple portions of a single footwear component, and wherein the second fluid line and the third fluid line engage or extend from the single footwear component at positions adjacent to each other on a first side of the single footwear component. Clause 19. The fluid system according to Clause 18, wherein the single footwear component includes a fluid-filled bladder component. Clause 20. The fluid system according to any one of Clauses 16 to 19, wherein the single fluid line component includes: a first end, a second end, and a connecting portion extending between the first end and the second end. Clause 21. The fluid system according to Clause 20, wherein the connecting portion defines a concave chamber. Clause 22. The fluid system according to any one of Clauses 2, 3, or 6, wherein the second fluid line and the third fluid line engage or extend from the foot support bladder at positions adjacent to each other on a first side of the foot support bladder. Clause 23. The fluid system according to any one of Clauses 2, 3, 6, or 22, wherein the pump and the fluid storage chamber include multiple portions of a single footwear component, and wherein the second fluid line and the third fluid line engage or extend from the single footwear component at positions adjacent to each other on a first side of the single footwear component. Clause 24. The fluid system according to Clause 23, wherein the single footwear component includes a fluid-filled bladder component. Clause 25. The fluid system according to any one of Clauses 22 to 24, wherein at least one of the second fluid line and the third fluid line defines a concave chamber. Clause 26. The fluid system according to any one of Clauses 1 to 3 or 16 to 25, further comprising: a switch configured to change the second fluid line between an open configuration and a closed configuration. Clause 27. The fluid system according to Clause 26, wherein the switch includes a protrusion that is movable to clamp the second fluid line when the switch places the second fluid line in the closed configuration. Clause 28. The fluid system according to Clause 26 or 27, wherein when the second fluid line is in the closed configuration, the pump moves fluid from the fluid storage chamber to the foot support bladder. Clause 29. The fluid system according to Clause 28, wherein with the second fluid line in the closed configuration, the movement of fluid from the fluid storage chamber to the foot support bladder reduces the height dimension of the fluid storage chamber. Clause 30. The fluid system according to any one of Clauses 26 to 29, wherein when the second fluid line is in the open configuration, the fluid pressure throughout the fluid system is equal. Clause 31. The fluid system according to any one of Clauses 26 to 30, wherein interacting with the switch to change the second fluid line from the closed configuration to the open configuration increases the height dimension of the fluid storage chamber. Clause 32. The fluid system according to any one of Clauses 26 to 30, wherein interacting with the switch to change the second fluid line from the closed configuration to the open configuration causes the height dimension of the fluid storage chamber to immediately increase when the fluid pressure throughout the fluid system is equal. Clause 33. A foot support system for a footwear product, comprising: (A) a foot support bladder; (B) a fluid storage chamber; (C) a pump that includes an inlet and an outlet, the outlet supplying fluid to the foot support bladder; (D) a first fluid line that places the fluid storage chamber in fluid communication with the inlet of the pump; and (E) a second fluid line that places the foot support bladder in fluid communication with the fluid storage chamber. Clause 34. The foot support system according to Clause 33, further comprising: (A) a third fluid line that places the pump in fluid communication with the foot support bladder; and (B) a fluid line support member located on a first side of the foot support system, the fluid line support member engaging a first surface of the third fluid line. Clause 35. The foot support system according to Clause 34, wherein the fluid line support member includes a first outer concave surface that engages the first surface of the third fluid line. Clause 36. The foot support system according to Clause 33 further includes: a fluid pipeline support member located on a first side of the foot support system, the fluid pipeline support member engaging a first surface of the second fluid pipeline. Clause 37. The foot support system according to Clause 36, wherein the fluid pipeline support member includes a first outer concave surface that engages the first surface of the second fluid pipeline. Clause 38. The foot support system according to Clause 33 further includes: (A) a third fluid pipeline that places the pump in fluid communication with the foot support bladder; and (B) a fluid pipeline support member located on a first side of the foot support system, the fluid pipeline support member engaging a first surface of the second fluid pipeline and a first surface of the third fluid pipeline. Clause 39. The foot support system according to Clause 38, wherein the fluid pipeline support member includes a first outer concave surface and a second outer concave surface, the first outer concave surface engaging the first surface of the second fluid pipeline, and the second outer concave surface engaging the first surface of the third fluid pipeline. Clause 40. The foot support system according to Clause 39, wherein the first outer concave surface is positioned adjacent to the second outer concave surface. Clause 41. The foot support system according to Clause 40, wherein the first outer concave surface is in front of the second outer concave surface in a longitudinal direction of the foot support system. Clause 42. The foot support system according to any one of Clauses 38 to 41, wherein the second fluid pipeline and the third fluid pipeline include multiple portions of a single fluid pipeline component. Clause 43. The foot support system according to Clause 42, wherein the single fluid pipeline component includes: a first end, a second end, and a connecting portion extending between the first end and the second end. Clause 44. The foot support system according to any one of Clauses 36 to 42 further includes: a switch configured to change the second fluid pipeline between an open configuration and a closed configuration. Clause 45. The foot support system according to Clause 44, wherein the switch engages the fluid pipeline support member. Clause 46. The foot support system according to Clause 44 or 45, wherein the switch includes a protrusion that is movable to clamp the second fluid pipeline when the switch places the second fluid pipeline in the closed configuration. Clause 47. The foot support system according to Clause 34 or 35, wherein the second fluid line and the third fluid line comprise multiple portions of a single fluid line component. Clause 48. The foot support system according to Clause 47, wherein the second fluid line and the third fluid line are joined to or extend from the foot support bladder at positions adjacent to each other on a first side of the foot support bladder. Clause 49. The foot support system according to Clause 47 or 48, wherein the pump and the fluid storage chamber comprise multiple portions of a single footwear component, and wherein the second fluid line and the third fluid line are joined to or extend from the single footwear component at positions adjacent to each other on a first side of the single footwear component. Clause 50. The foot support system according to Clause 49, wherein the single footwear component comprises a fluid-filled bladder component. Clause 51. The foot support system according to any one of Clauses 47 to 50, wherein the single fluid line component comprises: a first end, a second end, and a connecting portion extending between the first end and the second end. Clause 52. The foot support system according to Clause 51, wherein the connecting portion defines a concave chamber. Clause 53. The foot support system according to any one of Clauses 33 to 51, further comprising: a first midsole component that extends between the foot support bladder and the fluid storage chamber and at least partially separates the foot support bladder and the fluid storage chamber. Clause 54. The foot support system according to Clause 53, wherein the first midsole component comprises a top surface and a bottom surface, and wherein the bottom surface engages at least a portion of the fluid storage chamber. Clause 55. The foot support system according to Clause 53, wherein the first midsole component comprises a top surface and a bottom surface, and wherein the top surface engages at least a portion of the foot support bladder. Clause 56. The foot support system according to Clause 53, wherein the first midsole component comprises a top surface and a bottom surface, wherein the bottom surface engages at least a portion of the fluid storage chamber, and wherein the top surface engages at least a portion of the foot support bladder. Clause 57. The foot support system according to Clause 55 or 56, further comprising a second midsole component, wherein at least a portion of the foot support bladder is located between the first midsole component and the second midsole component. Clause 58. The foot support system according to any one of Clauses 53 to 56 further includes a second midsole member located above the top surface of the foot support bladder. Clause 59. The foot support system according to any one of Clauses 34, 35 or 38, wherein the second fluid line and the third fluid line are joined to or extend from the foot support bladder at positions adjacent to each other on a first side of the foot support bladder. Clause 60. The foot support system according to any one of Clauses 34, 35, 38 or 59, wherein the pump and the fluid storage chamber comprise multiple parts of a single footwear component, and wherein the second fluid line and the third fluid line are joined to or extend from the single footwear component at positions adjacent to each other on a first side of the single footwear component. Clause 61. The foot support system according to Clause 60, wherein the single footwear component comprises a fluid-filled bladder component. Clause 62. The foot support system according to any one of Clauses 59 to 61, wherein at least one of the second fluid line and the third fluid line defines a concave chamber. Clause 63. The foot support system according to any one of Clauses 33 to 62 further includes an outsole member forming at least a part of the bottom outer surface of the foot support system. Clause 64. The foot support system according to Clause 63, wherein the top surface of the outsole member engages the bottom surface of the fluid storage chamber. Clause 65. The foot support system according to Clause 63 or 64, wherein the outsole member includes a pump actuator. Clause 66. The foot support system according to Clause 65, wherein the pump actuator is located in the heel region of the foot support system. Clause 67. The foot support system according to any one of Clauses 33 to 35 or 47 to 66 further includes: a switch configured to change the second fluid line between an open configuration and a closed configuration. Clause 68. The foot support system according to Clause 67, wherein the switch includes a protrusion that is movable to clamp the second fluid line when the switch places the second fluid line in the closed configuration. Clause 69. The foot support system according to Clause 67 or 68, wherein when the second fluid line is in the closed configuration, the pump moves fluid from the fluid storage chamber to the foot support bladder. Clause 70. The foot support system according to Clause 69, wherein, when the second fluid pipeline is in the closed configuration, the movement of the fluid from the fluid storage chamber to the foot support bladder reduces the height dimension of the fluid storage chamber. Clause 71. The foot support system according to any one of Clauses 67 to 70, wherein when the second fluid pipeline is in the open configuration, the fluid pressures in the foot support bladder and the fluid storage chamber are equal. Clause 72. The foot support system according to any one of Clauses 67 to 71, wherein interacting with the switch to change the second fluid pipeline from the closed configuration to the open configuration increases the height dimension of the fluid storage chamber. Clause 73. The foot support system according to any one of Clauses 67 to 71, wherein interacting with the switch to change the second fluid pipeline from the closed configuration to the open configuration causes the height dimension of the fluid storage chamber to immediately increase when the fluid pressures in the foot support bladder and the fluid storage chamber are equal. Clause 74. The foot support system according to any one of Clauses 33 to 73, wherein the foot support system includes at least a part of a sole structure for a footwear product. Clause 75. A footwear product, comprising: (A) an upper; and (B) a sole structure joined to the upper, the sole structure including the foot support system according to any one of Clauses 33 to 74. Clause 76. A sole structure for a footwear product, comprising: (A) a foot support bladder; (B) a fluid storage chamber; (C) a foot-activated pump, the foot-activated pump including: (i) an inlet for receiving fluid from the fluid storage chamber and (ii) an outlet for supplying fluid to the foot support bladder; (D) a fluid pipeline that places the foot support bladder in fluid communication with the fluid storage chamber; and (E) a switch system configured to change the foot support bladder between: (i) a high-pressure foot support configuration in which the fluid pipeline is closed and (ii) a low-pressure foot support configuration in which the fluid pipeline is open. Clause 77. The sole structure according to Clause 76, wherein the switch system includes a switch button having a protrusion that can move to clamp the fluid pipeline closed when the switch system places the foot support bladder in the high-pressure foot support configuration. Clause 78. The sole structure according to Clause 76 or 77, wherein when the foot support bladder is in the high-pressure foot support configuration, the foot-activated pump moves fluid from the fluid storage chamber to the foot support bladder. Clause 79. The sole structure according to Clause 76 or 77, wherein when the foot support bladder is in the high-pressure foot support configuration, the foot activation pump incrementally moves fluid from the fluid storage chamber to the foot support bladder in response to the wearer's footsteps. Clause 80. The sole structure according to Clause 78 or 79, wherein sufficient movement of fluid from the fluid storage chamber to the foot support bladder reduces the height dimension of the fluid storage chamber. Clause 81. The sole structure according to Clause 78 or 79, wherein sufficient movement of fluid from the fluid storage chamber to the foot support bladder causes the fluid storage chamber to collapse. Clause 82. The sole structure according to any one of Clauses 76 to 81, wherein when the switch system places the foot support bladder in the low-pressure foot support configuration, the fluid pressure in the foot support bladder is equal to the fluid pressure in the fluid storage chamber. Clause 83. The sole structure according to any one of Clauses 76 to 82, wherein interacting with the switch system to change the foot support bladder from the high-pressure foot support configuration to the low-pressure foot support configuration increases the height dimension of the fluid storage chamber. Clause 84. The sole structure according to any one of Clauses 76 to 82, wherein interacting with the switch system to change the foot support bladder from the high-pressure foot support configuration to the low-pressure foot support configuration causes the height dimension of the fluid storage chamber to immediately increase when the fluid pressure in the fluid storage chamber increases. Clause 85. The sole structure according to any one of Clauses 76 to 84, wherein at least a portion of the upper surface of the fluid storage chamber is located below at least a portion of the lower surface of the foot support bladder. Clause 86. The sole structure according to Clause 85, further comprising a midsole component located between the upper surface of the fluid storage chamber and the lower surface of the foot support bladder. Clause 87. A footwear product, comprising: (A) an upper; and (B) a sole structure according to any one of Clauses 76 to 86 attached to the upper. 100: Fluid system 100S: Space 114: Check valve 118: Check valve 200: Sole structure 202: Upper 250: Footwear product 300: First midsole component 300G: Ground-facing surface 300H: Rear heel end 300L: Outer surface 300M: Inner surface 300T: Front foot tip 300U: Upward-facing surface 310: Receiving portion 310E: Receiving portion edge 310F: Front wall 310G: 310R: Rear wall 312: Base surface 314: Fluid pipeline support area 316: Valve support area 318: Pump support area 320: Valve support area 324: Recess 400: Foot support bladder 400C: Internal chamber 400F: Front foot area 400FE: Front edge 400G: Ground-facing surface 400H: Heel area 400M: Midfoot connection portion 400S: Peripheral seam 400U: Upward-facing surface 402: Fluid pipeline 402A: Fluid source pipeline 402S: Support surface 404: Seam or weld 410: Bladder port 412: Bladder port 500: Fluid storage chamber 500C: Internal chamber 500F: Front foot area 500G: Ground-facing surface 500H: Heel area 500M: Midfoot portion 500S: Sealed peripheral seam 500U: Upward-facing surface 502: Fluid pipeline 504: Fluid pipeline 504S: Support surface 508: Recessed notch 508W: Inner wall 510: Storage chamber port 512: Storage chamber port 520: Fluid source component 520I: Fluid source component inlet port 520O: Fluid source component outlet port 520W: Sealed or welded pipeline 522: Recess 550: Pump 550C: Internal chamber 552: Outlet 554: Inlet 554A: Fluid source port 590: 600: Support component 602: Base area 604: Fluid pipeline support surface 606: Receiving portion 700: Tube closure component 700A: Outer surface 800: Fluid tube connector component 800A: Sheet 800B: Sheet 800S: Seam 602: Base area 602A: One or more notched areas 604: Fluid pipeline support surface 604A: Fluid pipeline support area 604B: Fluid pipeline support area 604R: Raised ridge 606: Receiving portion 610F: Front switch support component 610R: Rear switch support component 612F: Support hole 612R: Support hole 614F1: Front support recess 614F2: Front support recess 614R1: Rear support recess 614R2: Rear support recess 700: Tube closure component 800: Fluid tube connector component 900: Switch 900F: Front wall 900I: Inner surface 900R: Rear wall 900X: Outer surface 902F: Front axial element 902R: Rear axial element 904F: Front protrusion element904R: Rear projection element 906: Switch support surface 906X: Position 908A: Tube support surface 908B: Tube support surface 1000: Second midsole component 1000FE: Front edge 1000G: Ground-facing surface 1000H: Rear heel end 1000L: Outer surface 1000M: Inner surface 1000P: Midsole projection 1000R: Recess 1000T: Forefoot tip 1000U: Upward-facing surface 1010: Protruding surface 1100L: Outer heel support component 1100M: Inner heel support component 1200: Outsole component 1200G: Ground-facing surface 1200U: Upward-facing surface 1212: Base surface 1214: Fluid pipeline support area 1216: Valve support area 1218: Pump support area 1218A: Starter structure 1218G: Outwardly extending surface 1220: Valve support area 1222: One or more protrusions 1224: Receiving portion 1224F: Front edge 1300: Pump starter component 1300G: Ground-facing surface 1300T: One or more attachment friction elements 1300U: Upward-facing surface 1310: Disconnected line 1700: Fluid system 1710: Foot support bladder 1710C: Inner chamber 1712: Foot support bladder inlet port 1714: Foot support bladder outlet port 1720: Fluid storage chamber 1720C: Inner chamber 1722: Storage chamber outlet port 1730: Pump 1730C: Inner chamber 1732: Pump outlet 1734: Pump inlet 1740: Switch component 1750: Check valve 1752: Check valve 1760: Fluid pipeline 1762: Fluid pipeline 1764: Fluid pipeline 1766: Fluid pipeline 1768: Inner fluid pipeline 1780: Magnification arrow The foregoing invention content of the present invention and the following specific embodiments of the present invention will be better understood when considered in conjunction with the drawings, in which like reference numerals represent the same or similar elements in all the various views in which the element symbol appears. [Figure 1A] and [Figure 1B] provide schematic diagrams of examples of fluid systems in a lower pressure foot support configuration (Figure 1A) and a higher pressure foot support configuration (Figure 1B) according to some examples of the present technology; [Figure 2A] to [Figure 2E] provide various views of a footwear product (Figure 2A) and a foot support system / soles structure (Figure 2A to Figure 2E) according to some examples of the present technology; [Figure 3A] to [Figure 3D] provide various views of a midsole component that can be used in a foot support system, a soles structure, and / or a footwear product according to some examples of the present technology; [Figures 4A] to [Figures 4D] provide various views of a foot support bladder that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 5A] to [Figures 5D] provide various views of a fluid source component (e.g., a combined pump and fluid reservoir) that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 6A] to [Figures 6F] provide various views of a support component (e.g., a combined fluid line support component and a switch support component) that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figure 7] illustrates a tube closure component that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figure 8] illustrates a tube closure component engaged with a support component according to some examples of the present technology; [Figures 9A] and [Figures 9B] provide various views of a fluid tube connector component (e.g., including two connected and / or parallel fluid lines) that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 10A] to [Figures 10D] provide various views of an exemplary fluid system and its incorporation into a foot support system and / or a footwear product according to some examples of the present technology; [Figures 11A] and [Figures 11B] provide various views of a switch component that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 12A] to [Figures 12D] provide various views of another midsole component that can be used in a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 13A] to [Figures 14B] provide various views of a heel support component that can be used in a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 15A] to [Figures 15C] provide various views of an outsole component that can be used in a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figures 16A] to [Figures 16C] provide various views of a pump actuator component that can be used in a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figure 17A] and [Figure 17B] provide schematic diagrams of examples of a fluid system in a higher pressure foot support configuration (Figure 17A) and a lower pressure foot support configuration (Figure 17B) according to some examples of the present technology; [Figure 18] provides a top view of a foot support bladder that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; [Figure 19] provides a top view of a fluid source component (e.g., a combined pump and fluid storage chamber) that can be used in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology; and [Figure 20A] and [Figure 20B] provide cross-sectional views showing transition features between a lower pressure foot support configuration and a higher pressure foot support configuration in a fluid system, a foot support system, a sole structure, and / or a footwear product according to some examples of the present technology. 520: Fluid source component 520I: Fluid source component inlet port 520O: Fluid source component outlet port 1700: Fluid system 1710: Foot support bladder 1710C: Internal chamber 1712: Foot support bladder inlet port 1714: Foot support bladder outlet port 1720: Fluid storage chamber 1720C: Internal chamber 1722: Storage chamber outlet port 1730: Pump 1730C: Internal chamber 1732: Pump outlet 1734: Pump inlet 1740: Switch component 1750: Check valve 1752: Check valve 1760: Fluid pipeline 1762: Fluid pipeline 1764: Fluid pipeline 1766: Fluid pipeline

Claims

1. A fluid system for footwear products, comprising: Foot support pouch; Fluid storage chamber; A pump, the pump including an inlet and an outlet, the outlet supplying fluid to the foot support bladder; A first fluid line placing the fluid reservoir in fluid communication with the inlet of the pump; a second fluid line placing the foot support bladder in fluid communication with the fluid reservoir; a switch configured to change the second fluid line between an open configuration and a closed configuration; and a support member wherein the switch is movably mounted on the support member, and wherein the support member further includes a first external fluid line support surface extending along and supporting the external surface of the second fluid line; wherein when the second fluid line is in the closed configuration, the pump is configured to move fluid from the fluid reservoir to the foot support bladder, and wherein: in the closed configuration, sufficient fluid movement from the fluid reservoir to the foot support bladder reduces the height dimension of the fluid reservoir.

2. The fluid system according to claim 1, wherein the switch includes a protrusion movable to clamp the second fluid line when the switch places the second fluid line in the closed configuration.

3. The fluid system according to claim 1, wherein: The movement of sufficient fluid from the fluid reservoir to the foot support bladder when the second fluid line is in the closed configuration causes the fluid reservoir to collapse and reduces the height of the fluid reservoir by at least 8 mm.

4. The fluid system according to claim 1, wherein: When the pump is started, the switch is in the closed configuration to move fluid from the fluid storage chamber to the foot support bladder and reduce the height dimension of the fluid storage chamber. It interacts with the switch to change the second fluid line from the closed configuration to the open configuration, thereby increasing the height dimension of the fluid storage chamber.

5. The fluid system according to claim 1, wherein: After the pump is started and the switch is in the closed configuration to move fluid from the fluid storage chamber to the foot support bladder and reduce the height dimension of the fluid storage chamber, it interacts with the switch to change the second fluid line from the closed configuration to the open configuration such that when the fluid pressure in the entire fluid system is equal, the height dimension of the fluid storage chamber immediately increases.

6. A foot support system for footwear, comprising: Foot support pouch; Fluid storage chamber; A pump, the pump including an inlet and an outlet, the outlet supplying fluid to the foot support bladder; A first fluid line placing the fluid reservoir in fluid communication with the inlet of the pump; a second fluid line placing the foot support bladder in fluid communication with the fluid reservoir; and a switch configured to change the second fluid line between an open configuration and a closed configuration; a support member, wherein the switch is movably mounted on the support member, and wherein the support member further includes a first external fluid line support surface extending along and supporting the external surface of the second fluid line; wherein when the second fluid line is in the closed configuration, the pump is configured to move fluid from the fluid reservoir to the foot support bladder, and wherein: sufficient fluid movement from the fluid reservoir to the foot support bladder during the second fluid line being in the closed configuration reduces the height dimension of the fluid reservoir.

7. The foot support system according to claim 6 further includes: A first midsole component extends between the foot support bladder and the fluid reservoir and at least partially separates the foot support bladder and the fluid reservoir, wherein the first midsole component includes a top surface and a bottom surface, wherein the bottom surface engages at least a portion of the fluid reservoir, and wherein the first midsole component includes a top surface and a bottom surface, wherein the top surface engages at least a portion of the foot support bladder.

8. The foot support system according to claim 7 further includes a second midsole component, wherein at least a portion of the foot support bladder is located between the first midsole component and the second midsole component.

9. The foot support system according to claim 6, wherein the switch includes a protrusion movable to clamp the second fluid line when the switch places the second fluid line in the closed configuration.

10. The foot support system according to claim 6, wherein: The second fluid line is in the closed configuration and sufficient fluid movement from the fluid storage chamber to the foot support bladder causes the fluid storage chamber to collapse and reduces the height dimension of the fluid storage chamber by at least 8 mm.

11. The foot support system according to claim 6, wherein: When the pump is started, the switch is in the closed configuration to move fluid from the fluid storage chamber to the foot support bladder and reduce the height dimension of the fluid storage chamber, and interacts with the switch to change the second fluid line from the closed configuration to the open configuration, thereby increasing the height dimension of the fluid storage chamber.

12. The foot support system according to claim 6, wherein: When the pump is started and the switch is in the closed configuration to move fluid from the fluid reservoir to the foot support bladder and reduce the height of the fluid reservoir, the switch interacts with the second fluid line to change the second fluid line from the closed configuration to the open configuration such that when the fluid pressure in the foot support bladder and the fluid reservoir are equal, the height of the fluid reservoir immediately increases.

13. A sole structure for footwear products, comprising: Foot support pouch; Fluid storage chamber; A foot-starting pump, comprising: (i) an inlet for receiving fluid from the fluid reservoir and (ii) an outlet for supplying fluid to the foot support bladder; a fluid line placing the foot support bladder in fluid communication with the fluid reservoir; and a switching system configured to change the foot support bladder between: (i) a high-pressure foot support configuration in which the fluid line is closed and (ii) a low-pressure foot support configuration in which the fluid line is open; and a support member located on one side of the sole structure, wherein the switching system includes a switch button movably mounted on the support member, and wherein the support member further includes a first concave outer surface extending along and supporting the outer surface of the fluid line, and fixing the outer surface of the fluid line in a position such that when the foot support bladder is in the high-pressure foot support configuration, the switch button contacts and closes the fluid line; When the foot support bladder is in the high-pressure foot support configuration, the foot initiation pump is configured to move fluid from the fluid reservoir to the foot support bladder, and wherein: sufficient fluid movement from the fluid reservoir to the foot support bladder reduces the height dimension of the fluid reservoir.

14. The sole structure according to claim 13, wherein the switching system includes a switch button having a protrusion movable to clamp and close the fluid line when the switching system places the foot support bladder in the high-pressure foot support configuration.

15. The sole structure according to claim 13, wherein when the foot support bladder is in the high-pressure foot support configuration, the foot activation pump responds to the wearer's footsteps by incrementally moving fluid from the fluid reservoir to the foot support bladder.

16. The sole structure according to claim 13, wherein sufficient fluid movement from the fluid reservoir to the foot support bladder causes the fluid reservoir to collapse and reduces the height dimension of the fluid reservoir by at least 8 mm.

17. The sole structure according to claim 13 further includes: A second fluid line, the second fluid line placing the outlet of the foot initiation pump in fluid communication with the foot support bladder, wherein the support component further includes a second concave outer surface positioned adjacent to the first concave outer surface, and wherein the outer surface of the second fluid line extends along and is supported by the second concave outer surface.

18. The sole structure according to claim 13, wherein after the foot activation pump is activated, the switching system is positioned to place the foot support bladder in the high-pressure foot support configuration, to move fluid from the fluid reservoir to the foot support bladder, and to reduce the height dimension of the fluid reservoir, and interacts with the switching system to change the foot support bladder from the high-pressure foot support configuration to the low-pressure foot support configuration, thereby increasing the height dimension of the fluid reservoir.

19. The sole structure according to claim 13, wherein after the foot activation pump is activated and the switching system is positioned to place the foot support bladder in the high-pressure foot support configuration, to move fluid from the fluid reservoir to the foot support bladder, and to reduce the height dimension of the fluid reservoir, interacts with the switching system to change the foot support bladder from the high-pressure foot support configuration to the low-pressure foot support configuration such that when the fluid pressure in the fluid reservoir increases, the height dimension of the fluid reservoir immediately increases.

20. The sole structure of claim 13, wherein at least a portion of the upper surface of the fluid reservoir is located below at least a portion of the lower surface of the foot support bladder, and wherein the sole structure further comprises a midsole component located between the upper surface of the fluid reservoir and the lower surface of the foot support bladder.

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